Harbinger of Flesh

Worship 1 (As this creature enters the battlefield, you may tap another untapped creatures you control. This creature enters the battlefield with a +1/+1 counter on it for each creature tapped this way.)
Whenever a creature you control is worshipped, put a heralding counter on Harbinger of Flesh.
Demons you cast cost {1} less to cast for each heralding counter on Harbinger of Flesh.