Cranial Plating

Color Identity:B

Market Price: $0.23

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218715_200w.jpg

Equipped creature gets +1/+0 for each artifact you control.
{B}{B}: Attach Cranial Plating to target creature you control.
Equip {1}

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Thoughtcast

Color Identity:U

Market Price: $0.33

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/98776_200w.jpg

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Draw two cards.

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Darksteel Citadel

Market Price: $0.32

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218795_200w.jpg

Indestructible
{T}: Add {C}.

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Signal Pest

Market Price: $0.36

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/39139_200w.jpg

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)
Signal Pest can't be blocked except by creatures with flying or reach.

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Etched Champion

Market Price: $1.36

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/97964_200w.jpg

Metalcraft — Etched Champion has protection from all colors as long as you control three or more artifacts.

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Springleaf Drum

Market Price: $0.45

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/219595_200w.jpg

{T}, Tap an untapped creature you control: Add one mana of any color.

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Seat of the Synod

Color Identity:U

Market Price: $1.31

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/171441_200w.jpg

(Seat of the Synod isn't a spell.)
{T}: Add {U}.

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Frogmite

Market Price: $0.12

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/98891_200w.jpg

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

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Master of Etherium

Color Identity:U

Market Price: $0.91

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218625_200w.jpg

Master of Etherium's power and toughness are each equal to the number of artifacts you control.
Other artifact creatures you control get +1/+1.

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Myr Enforcer

Market Price: $0.22

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/98899_200w.jpg

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

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Mox Opal

Market Price: $35.58

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218602_200w.jpg

Metalcraft — {T}: Add one mana of any color. Activate this ability only if you control three or more artifacts.

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Tezzeret, Agent of Bolas

Color Identity:B,U

Market Price: $7.84

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/39066_200w.jpg

+1: Look at the top five cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
−1: Target artifact becomes an artifact creature with base power and toughness 5/5.
−4: Target player loses X life and you gain X life, where X is twice the number of artifacts you control.

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Vault of Whispers

Color Identity:B

Market Price: $3.46

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/37453_200w.jpg

(Vault of Whispers isn't a spell.)
{T}: Add {B}.

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Ornithopter

Market Price: $0.27

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/126415_200w.jpg

Flying

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Blinkmoth Nexus

Market Price: $1.23

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218273_200w.jpg

{T}: Add {C}.
{1}: Blinkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying until end of turn. It's still a land.
{1}, {T}: Target Blinkmoth creature gets +1/+1 until end of turn.

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Memnite

Market Price: $1.53

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/36237_200w.jpg

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