Horrifying Mutation

Put three +1/+1 counters on target creature you control. It gains trample, deathtouch, and becomes a horror in addition to it's other types. (This effect lasts indefinitely)
Overload {4}{b}{b}{b}{g}{g} (You may cast this spell for it's overload cost. If you do, change it's text by replacing all instances of "target" with "each")
"Those... things. They burst from our enemies' bodies.
We all fled"