Aven Riftwatcher

Creature - Bird Rebel Soldier 2/3, 2W (3)
Flying
Vanishing 3 (This permanent enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
When Aven Riftwatcher enters the battlefield or leaves the battlefield, you gain 2 life.¹
Illus. Don Hazeltine

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Planar Chaos (Common)