Elspeth, Knight-Errant
Casting Cost:
+1: Put a 1/1 white Soldier creature token onto the battlefield.
+1: Target creature gets +3/+3 and gains flying until end of turn.
-8: You get an emblem with "Artifacts, creatures, enchantments, and lands you control have indestructible."
$ 000
Master of Etherium
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.
Mishra's Factory
: Add to your mana pool.
: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
: Target Assembly-Worker creature gets +1/+1 until end of turn.
Steel Overseer
: Put a +1/+1 counter on each artifact creature you control.
Swords to Plowshares
Exile target creature. Its controller gains life equal to its power.
Tezzeret the Seeker
+1: Untap up to two target artifacts.
-X: Search your library for an artifact card with converted mana cost X or less and put it onto the battlefield. Then shuffle your library.
-5: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn.