Phantasmal Mount

{1}{U} · Creature — Illusion Horse

Flying {T}: Target creature you control with toughness 2 or less gets +1/+1 and gains flying until end of turn. When this creature leaves the battlefield this turn, sacrifice that creature. When the creature leaves the battlefield this turn, sacrifice this creature.

Motor: se resuelve a mano

Rulings (1)

If the ability resolves, then the targeted creature’s toughness becomes greater than 2 later, Phantasmal Mount’s effect will not end. (The ability checks whether the creature has toughness 2 or less only at the time you activate it and the time it resolves.)
Wizards of the Coast · 2008-10-01