Gloomstealer Crab

Gloomstealer Crab can't attack or block as long
as it has fewer than five -1/-1 counters, it has vigilance as long as it has eight or more -1/-1 counters, it has Indestructible as long as it has fourteen or more -1/-1 counters.
Whenever Gloomstealer Crab attacks, if it has
eight or more -1/-1 counters on it, you may
choose to give or remove up to three -1/-1
counters from among creatures you control.
{u}{b},{t}: Double the amount of -1/-1 counters on Gloomseeker Crab.