Simic Basilisk
{4}{G}{G}
Creature -- Basilisk Mutant
0/0
Graft 3 (~this~ enters with three +1/+1 counters on it. Whenever another creature enters, you may move a +1/+1 counter from ~this~ onto it.)
{1}{G}: Until end of turn, target creature with a +1/+1 counter on it gains "Whenever ~this~ deals combat damage to a creature, destroy that creature at end of combat."