The Entity

Eminence - Whenever you cast a Killer spell, if The Entity is in the command zone or on the battlefield, create a 1/1 white Survivor creature token.

The Entity costs {1} less for each Killer you control.

Flying, Trample, First Strike

Activated abilities of other Killers you control cost {2} less.

Sacrifice 4 Survivors: Put 4 +1/+1 tokens on The Entity.