Old World Harbinger

Whenever you sacrifice an artifact, all creatures you control get +1/+0 until the end of turn.
{w}{b}{r}: Sacrifice three artifacts, then put a worship counter on Old World Harbinger.
If there are three or more worship counters on Old World Harbinger sacrifice it and create a 14/14 Demon token with flying and trample that has, "Whenever you sacrifice an artifact put a +1/+1 counter on this creature."