WereAmalgamation

When WereAmalgamation enters the battlefield,
exile X creatures from your graveyard. For each creature was exiled this way, create an
Equipment artifact named Body Part with
"Equipped creature gets +1/+1." attached to WereAmalgamation.
Whenever WereAmalgamation would die,
instead it gains indestructible until end of turn,
then sacrifice a Body Part attached to it. If you
can't, exile it.