Karzre, Flight's Freedom

Double Strike, Evolve, Flying
Karzre, Flight's Freedom enters the battlefield with 3 chain counters on it. Karzre, Flight's Freedom can't attack as long as it has chain counters on it. At the beginning of your upkeep, remove a chain counter.
{x}{2}:Sacrifice a creature and put X chain counters on Karzre, Flight's Freedom. Any player may activate this ability.