Jrav, Virulent Lord

Flying, Deathtouch
At the beginning of each opponents upkeep, you
get a poison counter. For each poison counter
you have Jrav gets +1/+1.
{2}, Sac a permanent: Remove a poison counter
from you and put 1 on target opponent.
{5}, Remove all poison counters from all players:
Create that many 1/1 green insect tokens
with flying and deathtouch.