Thanks to the addition of powerhouse defender enchantment Assault Formation, this deck has got some serious toughness in historic.

This list aims to run out some very cheap creatures like Aegis Turtle and Yoked Ox then turn them from docile bystanders to aggressive threats with High Alert and Huatli, the Sun's Heart. Check out the full list below and the video to see it in action.

Magic: The Gathering TCG Deck - The Best Defence by Merchant

'The Best Defence' - constructed deck list and prices for the Magic: The Gathering Trading Card Game from TCGplayer Infinite!

Created By: Merchant

Event:

Rank:

Historic

Market Price: $189.74

Cards

Sunpetal Grove

Color Identity:G,W

Market Price: $4.35

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/142039_200w.jpg

Sunpetal Grove enters the battlefield tapped unless you control a Forest or a Plains.
{T}: Add {G} or {W}.

Buy This Card! https://www.tcgplayer.com/product/142039/magic-ixalan-sunpetal-grove

Tetsuko Umezawa, Fugitive

Color Identity:U

Market Price: $1.51

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/162239_200w.jpg

Creatures you control with power or toughness 1 or less can't be blocked.

Buy This Card! https://www.tcgplayer.com/product/162239/magic-dominaria-tetsuko-umezawa-fugitive

Tower Defense

Color Identity:G

Market Price: $0.23

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/183441_200w.jpg

Creatures you control get +0/+5 and gain reach until end of turn.

Buy This Card! https://www.tcgplayer.com/product/183441/magic-ravnica-allegiance-tower-defense

Aegis Turtle

Color Identity:U

Market Price: $0.04

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/216381_200w.jpg

Buy This Card! https://www.tcgplayer.com/product/216381/magic-jumpstart-aegis-turtle

Forest

Color Identity:G

Market Price: $0.04

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/125584_200w.jpg

({T}: Add {G}.)

Buy This Card! https://www.tcgplayer.com/product/125584/magic-planechase-anthology-forest-156

Assault Formation

Color Identity:G

Market Price: $0.62

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/216167_200w.jpg

Each creature you control assigns combat damage equal to its toughness rather than its power.
{G}: Target creature with defender can attack this turn as though it didn't have defender.
{2}{G}: Creatures you control get +0/+1 until end of turn.

Buy This Card! https://www.tcgplayer.com/product/216167/magic-jumpstart-assault-formation

Huatli, the Sun's Heart

Color Identity:G,W

Market Price: $0.24

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188655_200w.jpg

Each creature you control assigns combat damage equal to its toughness rather than its power.
−3: You gain life equal to the greatest toughness among creatures you control.

Buy This Card! https://www.tcgplayer.com/product/188655/magic-war-of-the-spark-huatli-the-suns-heart

Surge Mare

Color Identity:U

Market Price: $0.06

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/169088_200w.jpg

Surge Mare can't be blocked by green creatures.
Whenever Surge Mare deals damage to an opponent, you may draw a card. If you do, discard a card.
{1}{U}: Surge Mare gets +2/-2 until end of turn.

Buy This Card! https://www.tcgplayer.com/product/169088/magic-core-set-2019-surge-mare

Hinterland Harbor

Color Identity:G,U

Market Price: $7.10

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/162120_200w.jpg

Hinterland Harbor enters the battlefield tapped unless you control a Forest or an Island.
{T}: Add {G} or {U}.

Buy This Card! https://www.tcgplayer.com/product/162120/magic-dominaria-hinterland-harbor

High Alert

Color Identity:U,W

Market Price: $0.46

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/183062_200w.jpg

Each creature you control assigns combat damage equal to its toughness rather than its power.
Creatures you control can attack as though they didn't have defender.
{2}{W}{U}: Untap target creature.

Buy This Card! https://www.tcgplayer.com/product/183062/magic-ravnica-allegiance-high-alert

Nyx-Fleece Ram

Color Identity:W

Market Price: $0.48

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/161893_200w.jpg

At the beginning of your upkeep, you gain 1 life.

Buy This Card! https://www.tcgplayer.com/product/161893/magic-masters-25-nyxfleece-ram

Temple Garden

Color Identity:G,W

Market Price: $9.20

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/175203_200w.jpg

({T}: Add {G} or {W}.)
As Temple Garden enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Buy This Card! https://www.tcgplayer.com/product/175203/magic-guilds-of-ravnica-temple-garden

Hallowed Fountain

Color Identity:U,W

Market Price: $8.04

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/182831_200w.jpg

({T}: Add {W} or {U}.)
As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Buy This Card! https://www.tcgplayer.com/product/182831/magic-ravnica-allegiance-hallowed-fountain

Arboreal Grazer

Color Identity:G

Market Price: $0.19

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188872_200w.jpg

Reach
When Arboreal Grazer enters the battlefield, you may put a land card from your hand onto the battlefield tapped.

Buy This Card! https://www.tcgplayer.com/product/188872/magic-war-of-the-spark-arboreal-grazer

Glacial Fortress

Color Identity:U,W

Market Price: $3.55

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/142037_200w.jpg

Glacial Fortress enters the battlefield tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.

Buy This Card! https://www.tcgplayer.com/product/142037/magic-ixalan-glacial-fortress

Yoked Ox

Color Identity:W

Market Price: $0.02

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192869_200w.jpg

Buy This Card! https://www.tcgplayer.com/product/192869/magic-core-set-2020-yoked-ox

Merfolk Secretkeeper // Venture Deeper

Color Identity:U

Market Price: $0.10

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/199509_200w.jpg

Buy This Card! https://shop.tcgplayer.com/magic/throne-of-eldraine/merfolk-secretkeeper

Island

Color Identity:U

Market Price: $0.05

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215718_200w.jpg

({T}: Add {U}.)

Buy This Card! https://www.tcgplayer.com/product/215718/magic-core-set-2021-island-265

Breeding Pool

Color Identity:G,U

Market Price: $19.99

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/182842_200w.jpg

({T}: Add {G} or {U}.)
As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Buy This Card! https://www.tcgplayer.com/product/182842/magic-ravnica-allegiance-breeding-pool

Plains

Color Identity:W

Market Price: $0.04

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/242996_200w.jpg

({T}: Add {W}.)

Buy This Card! https://www.tcgplayer.com/product/242996/magic-adventures-in-the-forgotten-realms-plains-263