{T}, Sacrifice Generator Servant: Add {C}{C}. If that mana is spent on a creature spell, it gains haste until end of turn. (That creature can attack and {T} as soon as it comes under your control.)

Flying

{T}: Add {C}{C}. Spend this mana only to cast artifact spells or activate abilities of artifacts. {U}, {T}: Search your library for a card named Heart-Piercer Bow or Vial of Dragonfire, reveal it, put it into your hand, then shuffle.

Scuttling Doom Engine can't be blocked by creatures with power 2 or less. When Scuttling Doom Engine dies, it deals 6 damage to target opponent or planeswalker.

As an additional cost to cast this spell, sacrifice a creature. Fling deals damage equal to the sacrificed creature's power to any target.

Lightning Bolt deals 3 damage to any target.

As an additional cost to cast this spell, sacrifice an artifact. Shrapnel Blast deals 5 damage to any target.

Indestructible {T}: Add {C}.

({T}: Add {U}.)

Izzet Boilerworks enters the battlefield tapped. When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand. {T}: Add {U}{R}.

Izzet Guildgate enters the battlefield tapped. {T}: Add {U} or {R}.

({T}: Add {R}.)