Liam, Natures Junky

Each creature spell you cast with mana value 5 or greater has Blitz. The Blitz cost is equal to its mana cost minus {1}.(You may choose to cast that spell for its blitz cost. If you do, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

Whenever you sacrifice a creature you control, deal damage equal to half that creatures power rounded
up to target player.