Flameblast Dragon

Creature - Dragon 5/5, 4RR (6)
Flying
Whenever Flameblast Dragon attacks, you may pay {X}{R}. If you do, Flameblast Dragon deals X damage to target creature or player.
Dragon lords of Jund rule by edicts of flame.
Illus. Jaime Jones

Gatherer Card Rulings [Nov 2009]

• 10/1/2008: You choose the target when the ability triggers. When the ability resolves, you choose a value for X and decide whether to pay {X}{R}. If you do decide to pay {X}{R}, it's too late for any player to respond since the ability is already in the midst of resolving.

Format Legality	Legal in Vintage, Legacy, Extended, Standard
Printings (1/9)	Shards of Alara (Rare)