Flying

Metalcraft — : Exile Argent Sphinx. Return it to the battlefield under your control at the beginning of the next end step. Activate only if you control three or more artifacts.

Metalcraft — As long as you control three or more artifacts, Auriok Sunchaser gets +2/+2 and has flying.

Metalcraft — When Bleak Coven Vampires enters, if you control three or more artifacts, target player loses 4 life and you gain 4 life.

Metalcraft — Carapace Forger gets +2/+2 as long as you control three or more artifacts.

Concussive Bolt deals 4 damage to target player or planeswalker.

Metalcraft — If you control three or more artifacts, creatures controlled by that player or by that planeswalker's controller can't block this turn.

Target player sacrifices an attacking creature of their choice.

Metalcraft — That player sacrifices two attacking creatures of their choice instead if you control three or more artifacts.

Metalcraft — As long as you control three or more artifacts, Ezuri's Brigade gets +4/+4 and has trample.

Metalcraft — Ghalma's Warden gets +2/+2 as long as you control three or more artifacts.

First strike

Metalcraft — Creatures you control get +3/+0 as long as you control three or more artifacts.

Flying

Metalcraft — When Lumengrid Drake enters, if you control three or more artifacts, return target creature to its owner's hand.

Each player shuffles the cards from their hand into their library, then draws that many cards.

Metalcraft — If you control three or more artifacts, Molten Psyche deals damage to each opponent equal to the number of cards that player has drawn this turn.

Whenever an Equipment you control enters, you may draw a card.

Metalcraft — Equipment you control have equip as long as you control three or more artifacts.

Metalcraft — Rusted Relic is a 5/5 Golem artifact creature as long as you control three or more artifacts.

Metalcraft — Snapsail Glider has flying as long as you control three or more artifacts.

Defender

Metalcraft — As long as you control three or more artifacts, Spire Serpent gets +2/+2 and can attack as though it didn't have defender.

: Add .

Metalcraft — : Add for each Urza's land you control. Activate only if you control three or more artifacts.

Metalcraft — Whenever Vedalken Humiliator attacks, if you control three or more artifacts, creatures your opponents control lose all abilities and have base power and toughness 1/1 until end of turn.

2 — Whenever this creature attacks, put a +1/+1 counter on it.

3 — Metalcraft — This permanent has protection from noncreature permanents as long as you control three or more artifacts.

2 — 5/1

4 — 7/4