{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

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

When you cast this spell, exile up to one target permanent that's one or more colors. Whenever you cast a colorless spell, exile up to one target permanent that's one or more colors. +2: You gain 3 life and draw a card. 0: Add {C}{C}{C}. −11: Search your library for any number of colorless nonland cards, exile them, then shuffle. Until end of turn, you may cast those cards without paying their mana costs.

Activated abilities of artifacts your opponents control can't be activated. +1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value. −2: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.