When Urza, Lord High Artificer enters, create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."Tap an untapped artifact you control: Add .: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.
Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays .
Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays .
Return target permanent card with mana value 3 or less from your graveyard to the battlefield. If this spell was cast from a graveyard, you may copy this spell and may choose a new target for the copy.Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays .
If a land is tapped for two or more mana, it produces instead of any other type and amount.Each spell a player casts costs more to cast for each other spell that player has cast this turn.
Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays .
: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.
: Add .: 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.
Gemstone Mine enters with three mining counters on it., Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.
: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.
: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.
