Reanimated Dragon

When Reanimated Dragon enters the battlefield,
if it's Reanimate cost wasn't paid, sacrifice it.
When Reanimated Dragon enters the battlefield,
destroy target creature.
Reanimate {5}{b}{b}{b} (Use this ability only if
Reanimated Dragon is in your graveyard. Pay this
cost to return Reanimated Dragon to the battlefield
from your graveyard.)