Qlaar, Ravenous Bloodpact

Instead of paying Qlaar, Ravenous Bloodpact's
mana cost, you may sacrifice 4 Tribals. If you do,
put 2 +1/+1 counters on him.
Menace
Whenever Qlaar, Ravenous Bloodpact attacks,
target opponent sacrifices a creature.
{b}{r}: Demons you control get +1/+1
until end of turn.