Rabid Hound

Whenever Rabid Hound deals damage to a
player or planeswalker, you may sacrifice it.
When you do, it deals damage equal to its
power to any target.

Blitz—{3}{r} (If you cast this spell for its blitz
cost, it gains haste and "When this creature
dies, draw a card". Sacrifice it at the beginning
of the next end step.)