Terranima Sickness

{t}: Place a Terranima Counter on a Creature.
{3}: Untap Terranima Sickness
{t}: Target a creature with at least 5 Terranima Counters on it, take control of that creature.
When you gain control of a creature as a result
of this ability it gains "When this Creature would
enter the graveyard, exile it instead".