Writing on new themes means forgoing the usual discussion of a deck's history; I normally like to start an article like this with a look at the archetype's initial release, and some talk about how it's impacted both the competitive and casual scenes over the years, but when I can't do that I often look to delve into the lore and symbolism the strategy's rooted in. Yu-Gi-Oh doesn't skimp when it comes to creating rich backstories and interwoven, nuanced themes; a lot of the game's biggest decks are actually rife with hidden gems and Easter eggs.
Then… there's the Melffy.
It's a grouping of cute lil' pastel monsters that just want hugs. There's no deep hidden backstory, no clandestine symbolism, nothing superfluous. I mean, there's a lot of cute fluff? But nothing that's deeper than a metaphorical hug with your eyes.
The closest thing I can think of for a backstory that explains the Melffy effects just comes from the timidity of woodland creatures. When your opponent summons a monster or attacks a Melffy, they evacuate your field and retreat to the hand like skittish animals. I don't know about your experiences, but for me, I find woodland creatures are generally pretty cautious like that around humans. So unless you're Snow White it makes sense.
Come on, it's not that big of a stretch. If you don't like my rationale just focus on Melffy Mommy
While you can field all the Melffy monsters you want from your hand during your End Phase, the passivity of the Melffy monsters puts you in a unique position. Typically, both aggressive and defensive themes play out monsters in the Main Phase so you can do something with the cards you're summoning, but Melffy play to their own weird strengths.
Know that to really leverage the power of the Melffy monsters, you'll need to be a tad patient. Melffy don't have a big starter card that sets everything up, like an Armageddon Knight, Elemental HERO Stratos, or Girsu, the Orcust Mekk-Knight. But the Melffy are all surprisingly good if you're willing to put in the effort.
Melffy Catty, Melffy Puppy, Melffy Fenny, and Melffy Pony all have effects that snowball your Melffy horde, searching and yarding other Melffy from your deck, your graveyard and your hand. The Melffy Xyz have built-in protection effects and search abilities too, while the Melffy spells – Melffy Tag and Melffy Hide-and-Seek – all work together to search and summon more Melffy.
Basically, it's a nonstop spinning carousel of summoning and recycling more and more Level 2 Beast monsters. Sure, there's some variation, but everything's basically an extension of Melffy Puppy. Spend a few turns triggering Melffy Catty, Melffy Puppy, and Melffy Hide-and-Seek, and you'll have so many Melffy you won't know what to do with them all.
In terms of the "best" things the Melffy deck can do, it's important to recognize what the deck can't do. With a pressing need to include so many small-sized critters just for the deck to function, Melffy aren't set up to be a giant combo deck, and they can't hide behind their traps forever. You'll need a flexible middle ground that doesn't compromise the integrity of the Melffy monsters themselves.
Thankfully, Melffy decks have access to enough cards that won't hemorrhage your card economy, like… Battlewasps? (It's really hard for me to insult that deck because I can't remember what the cards do.)
Anyways, the point is that the Melffy benefit from years of Beast support, filling the gaps in their native card pool. With Obedience Schooled, Rescue Cat and Rescue Rabbit, you have lots of ways to field numerous cards for both defense and aggression. The lone Melffy Normal Monster, Melffy Rabby, works in your favor because you can bring it out with Unexpected Dai and Rescue Rabbit, ensuring that you'll have the minimal requirements of "multiple Beasts on the field" pretty much all the time.
Want to sit on protection with a Melffy of the Forest and a Melffy Playhouse to bounce your opponent's monsters? That's easily achieved with all the off-theme Beast support. How about Naturia Beast? Thanks to Key Mouse and X-Saber Airbellum, Naturia Beast is always close at hand. Why not Herald of the Arc Light too: just throw in Hop Ear Squadron and it's good enough to get there!
What I like about the Melffy is that they're so overlooked. When I first saw the deck, I thought you could only sit around and summon them during your End Phase, but those Beast support cards are just a few of the fast, efficient tricks that could launch Melffy into the competitive scene. With the whole world focused on Dogmatika and Infernoble Knights, the Melffy are scampering way below the radar.
It's not the case for every strategy, but in general, you'd like to build your deck so that it can do something going first, even if the deck's geared to go second. There's nothing worse than being stuck on the play when you don't want to be, drawing a poor opening hand, and watching your opponent wreak havoc on you while you sit there hoping to survive long enough to play Yu-Gi-Oh.
You don't even get the consolation prize of drawing an extra card.
Whether you want to play all the side support to make Melffy competitive, or you just want to build the deck casually as your cute fun deck, make sure you get to do something on your first turn! If you want to steer clear of the meta opt-ins, then build to maximize your chances of seeing Melffy Catty and Melffy Puppy as soon as possible.
As I said before, most of the effects snowball turn after turn. So as long as you get off on the right foot to start, the rest of the duel will be smoother sailing. Here's what my build looks like.
Yu-Gi-Oh! TCG Deck - Loukas' Melffy Deck by Loukas Peterson
'Loukas' Melffy Deck' - constructed deck list and prices for the Yu-Gi-Oh! Trading Card Game from TCGplayer Infinite!
Created By: Loukas Peterson
Market Price: $28.20
Market Price: $0.45
When this card is destroyed by battle and sent to the Graveyard, you can add 1 Level 3 or lower Beast-Type monster from your deck to your hand.
Number 64: Ronin Raccoon Sandayu
Market Price: $2.60
2 Level 2 Beast-Type monsters Once per turn: You can detach 1 Xyz Material from this card; Special Summon 1 "Kagemusha Raccoon Token" (Beast-Type/EARTH/Level 1/ATK ?/DEF 0). (When Summoned, its ATK becomes equal to the current ATK of the monster on the field that has the highest ATK. Your choice, if tied.) While you control another Beast-Type monster, this card cannot be destroyed by battle or card effects.
Market Price: $0.78
If your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack: You can return this card to the hand, then you can add 1 Beast monster from your Deck to your hand, except "Melffy Catty". During your End Phase: You can Special Summon this card from your hand. You can only use each effect of "Melffy Catty" once per turn.
Market Price: $0.89
If your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack: You can return this card to the hand, then you can Special Summon 1 Level 2 or lower Beast monster from your Deck, except "Melffy Puppy". During your End Phase: You can Special Summon this card from your hand. You can only use each effect of "Melffy Puppy" once per turn.
Market Price: $0.22
Target 1 monster in either GY; Special Summon it.
Market Price: $0.16
When this card inflicts Battle Damage to your opponent by a direct attack, discard 1 random card from your opponent's hand.
Market Price: $0.78
Cannot be Special Summoned from the Deck. You can banish this face-up card you control; Special Summon 2 Level 4 or lower Normal Monsters with the same name from your Deck, but destroy them during the End Phase. You can only use this effect of "Rescue Rabbit" once per turn.
Market Price: $3.31
You can send this face-up card to the Graveyard to Special Summon 2 Level 3 or lower Beast-Type monsters from your Deck. The monsters are destroyed during the End Phase.
Buy This Card! https://shop.tcgplayer.com/yugioh/champion-pack-5/rescue-cat
Melffy of the Forest
Market Price: $3.00
2 Level 2 monsters
You can detach 1 material from this card; add 1 "Melffy" card from your Deck to your hand. If another face-up "Melffy" monster you control returns to your hand (except during the Damage Step): You can target 1 face-up monster your opponent controls; it cannot attack, also its effects are negated while it is face-up on the field. You can only use each effect of "Melffy of the Forest" once per turn.
Market Price: $0.17
2+ Level 2 Beast monsters
Once per turn (Quick Effect): You can attach 1 Beast monster from your hand or face-up field to this card as material. This card gains effects based on the number of materials attached to it.
• 3+: Cannot be destroyed by battle.
• 4+: You take no damage from battles involving this card.
• 5+: When an attack is declared involving this card and an Attack Position monster: You can inflict damage to your opponent equal to that Attack Position monster's ATK.
Market Price: $0.39
If you control no monsters: Special Summon 3 Level 2 or lower Beast-Type Effect Monsters with different names from your Deck. Their effects are negated, and they are destroyed during the End Phase. If you activate this card, you cannot Special Summon for the rest of this turn, except Beast-Type monsters.
Market Price: $1.07
1 EARTH Tuner + 1 or more non-Tuner EARTH monsters
During either player's turn, when a Spell Card is activated: You can send the top 2 cards of your Deck to the GY; negate the activation, and if you do, destroy it. This card must be face-up on the field to activate and to resolve this effect.
Buy This Card! https://shop.tcgplayer.com/yugioh/duel-power/naturia-beast
Number 45: Crumble Logos the Prophet of Demolition
Market Price: $0.42
2 or more Level 2 monsters
Once per turn: You can detach 1 Xyz Material from this card, then target 1 other face-up card on the field; while this monster is face-up on the field, that target has its effects negated. While that target is on the field, cards with the same name as that target, and their effects, cannot be activated.
Hop Ear Squadron
Market Price: $0.20
During your opponent's Main Phase (Quick Effect): You can target 1 face-up monster you control; Special Summon this card from your hand, and if you do, immediately after this effect resolves, Synchro Summon 1 Synchro Monster using only this card you control and that target. You can only use this effect of "Hop Ear Squadron" once per turn.
Market Price: $0.14
The first time each Beast monster you control would be destroyed by card effect each turn, it is not destroyed. You can target 3 Beast monsters in your GY with different names; shuffle them into the Deck, then draw 1 card. You can only use this effect of "Melffy Hide-and-Seek" once per turn.
Ayers Rock Sunrise
Market Price: $0.29
Target 1 Beast-Type monster in your Graveyard; Special Summon that target, and if you do, all face-up monsters your opponent currently controls lose 200 ATK for each Beast, Plant, and Winged Beast-Type monster currently in your Graveyard, until the end of this turn. You can only activate 1 "Ayers Rock Sunrise" per turn.
Market Price: $3.94
1 EARTH Tuner + 1 or more non-Tuner EARTH monsters
While this card is face-up on the field, you can remove from play 2 cards in your Graveyard to negate the activation of a Trap Card and destroy it.
Market Price: $0.13
If your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack: You can return this card to the hand, then you can Special Summon 1 Beast monster from your hand, except "Melffy Fenny". During your End Phase: You can Special Summon this card from your hand. You can only use each effect of "Melffy Fenny" once per turn.
Market Price: $0.15
Target 1 "Melffy" monster in your GY; Special Summon it. You can only activate 1 "Melffy Tag" per turn.
Kalantosa, Mystical Beast of the Forest
Market Price: $0.25
If this card is Special Summoned by the effect of a Beast-Type monster: You can target 1 card on the field; destroy that target.
Market Price: $4.75
2 monsters with different names
If this card is Link Summoned: You can discard 1 card, then target 1 Spell/Trap your opponent controls; destroy it, then, if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of "Knightmare Phoenix" once per turn. Co-linked monsters you control cannot be destroyed by battle.
Market Price: $0.17
Detach any number of materials from Beast Xyz Monsters you control, then target up to that many cards your opponent controls; return them to the hand, also all Beast Xyz Monsters you control gain 500 ATK for each material detached to activate this card, until the end of this turn.
Market Price: $14.34
2+ monsters with different names
If this card is Link Summoned: You can discard 1 card, then target 1 card on the field; return it to the Deck, then, if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of "Knightmare Unicorn" once per turn. While any co-linked "Knightmare" monsters are on the field, for your normal draw in your Draw Phase, draw 1 card for each different card name among those co-linked "Knightmare" monsters, instead of drawing just 1 card.
Called by the Grave
Market Price: $1.47
Target 1 monster in your opponent's GY; banish it, and if you do, monsters with the same original name as that banished monster have their effects negated until the end of the next turn.
Number F0: Utopic Future
Market Price: $0.13
2 Xyz Monsters with the same Rank, except "Number" monsters
(This card's original Rank is always treated as 1.)
Cannot be destroyed by battle, and neither player takes any battle damage from attacks involving this card. At the end of the Damage Step, if this card battled an opponent's monster: You can take control of that opponent's monster until the end of the Battle Phase. If this face-up card on the field would be destroyed by a card effect, you can detach 1 Xyz Material from this card instead.
Market Price: $68.63
2+ Effect Monsters
Your opponent cannot activate cards or effects in response to this card's effect activations. If this card is Link Summoned: You can target 1 Link Monster that was used as material for its Link Summon; this card gains ATK equal to that monster's Link Rating x 1000. You can banish 1 Link Monster from your field or GY; destroy 1 card your opponent controls, also for the rest of this turn, you cannot banish monsters with that same Attribute to activate this effect of "Accesscode Talker".
Valerifawn, Mystical Beast of the Forest
Market Price: $0.24
You can discard 1 card, then target 1 Level 2 or lower Beast monster in your GY, except "Valerifawn, Mystical Beast of the Forest"; Special Summon it in Attack Position or face-down Defense Position. You can only use this effect of "Valerifawn, Mystical Beast of the Forest" once per turn.
Market Price: $0.15
If your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack: You can return this card to the hand, then you can add 1 Level 2 or lower Beast monster from your GY to your hand, except "Melffy Pony". During your End Phase: You can Special Summon this card from your hand. You can only use each effect of "Melffy Pony" once per turn.
Market Price: $0.11
Rabby's up on that favorite stump again, looking all around the forest at all the fluffy friends! Do you like exploring, too? Good! Let's go find more Melffy friends with Rabby!
Sky Cavalry Centaurea
Market Price: $6.86
2 Level 2 monsters
While this card has Xyz Material, it cannot be destroyed by battle. If this card battles an opponent's monster, and your opponent still controls that monster at the end of the Damage Step: You can detach 1 Xyz Material from this card; return that monster to the hand.
Market Price: $0.75
If you control no monsters: Special Summon 1 Level 4 or lower Normal Monster from the Deck.
Herald of the Arc Light
Market Price: $3.85
1 Tuner + 1 or more non-Tuner monsters
Any monster sent from the hand or Main Deck to the GY is banished instead. During either player's turn, when a Spell/Trap or monster effect is activated: You can Tribute this card; negate the activation, and if you do, destroy that card. If this card is sent to the GY: You can add 1 Ritual Monster or 1 Ritual Spell from your Deck to your hand.
Market Price: $1.36
2 EARTH monsters
All EARTH monsters on the field gain 500 ATK and DEF, also all WIND monsters on the field lose 400 ATK and DEF. If this card is destroyed by battle or card effect: You can target 1 EARTH monster in your GY; add it to your hand. You can only use this effect of "Missus Radiant" once per turn.
Yeah that's right: this is one of those rare cases where spare change = a complete deck. The only big card here is Accesscode Talker, and if you're a competitive player there's a good chance you already own it.
While price isn't the only prerequisite to get a recommendation out of me, it certainly tips the scales when I'm feeling indecisive about building something new. Megaliths weren't at the top of my radar when they were first announced, but their incredibly low price was more than enough to convince me to pick up the deck and give it a shot.
You'll have to shell out a few bucks for Melffy of the Forest, sure, but the rest of the Melffy cards cost less than a stick of gum. Just like the Megaliths the entire deck is cheap, so you might as well buy triplicates of everything "just in case". When a playset of most Melffy cards cost a quarter, I'm not exaggerating when I say it's worth the price of entry.
Besides, the deck's super cute… so what's not to love?
Just remember: beat your opponents before they beat you.