Kavas, Speed Demon

Cards in the graveyard can be cast for their Blitz
cost.
Whenever you cast a creature for its Blitz cost,
you may pay {b/r}{r/g}. If you do, choose one —
• The next blitz cost you pay costs {b}{r}{g} less.
• Sacrifice X creatures cast for their blitz cost:
deal X damage to any target.
• Creatures that were cast for their blitz cost gain
a +1/+1 counter.