Fletcher, a Reaper

Double Strike, Infect
When Fletcher, a Reaper enters the battlefield, it
deals X damage to each other creature on the battlefield, for each creature that died Fletcher, a Reaper gets a +1+1 counter.
Fletcher, a Reaper enters the battlefield with X
+1+1 counters.
{t}: Destroy target creature.
Pay 6 life, {p/b}{p/b}: Remove a +1+1 counter from
Fletcher, a Reaper target player gets a poison
counter.