Decaying Army

Trample, Mighty X (This creature enters the
battlefield with X +1/+1 counters on it. At the
beginning of yourupkeep, if you gained life last
turn, put a +1/+1counter on this creature.)
At the beggining of your upkeep remove a
+1/+1 conter from decaying army.
{1}{b}{b} or pay 6 life: Amass 2.
And so they crawled to their death,
and the death of everything else.