Vesikali the Scaled Swarm

Flying
Devour 1 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters
the battlefield with that many +1/+1 counters on it.)
Whenever Vesikali the Scaled Swarm attacks you
may create X 1/1 black Insect creature tokens
with flying where X is the number of counters on Vesikali. When you do you lose X life.