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'Haste
At the beginning of your upkeep, you may sacrifice a creature. When you do, this creature deals 2 damage to target opponent or planeswalker.
'Flying
Whenever this creature attacks, you may pay {X}{R}. If you do, it deals X damage to any target.
'{1}{R}: This creature deals 1 damage to each creature without flying.
'Destroy target artifact you don't control.
Overload {4}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
'Flying
Whenever Firebird attacks, other attacking creatures get +X/+0 until end of turn, where X is Firebird's power.
'This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.
'Flying
Whenever Firebird attacks, other attacking creatures get +X/+0 until end of turn, where X is Firebird's power.
'Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.
'Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.
'Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.
'Flying
Whenever this creature attacks, you may pay {X}{R}. If you do, it deals X damage to any target.
'{1}{R}: This creature deals 1 damage to each creature without flying.