Treva, the Renewer

Legendary Creature - Dragon 6/6, 3WUG (6)
Flying
Whenever Treva, the Renewer deals combat damage to a player, you may pay {2}{W}. If you do, choose a color, then you gain 1 life for each permanent of that color.¹
Illus. Ciruelo

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: You choose the color during resolution. This means your opponent does not get to react after knowing the color you chose.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (2/7)	Pro Tour (Special) Invasion (Rare)