Ever-growing Disaster

Deathtouch
Engorge (Each creature you sacrifice while casting this spell pays for {1} or one mana of that creature's color.)
Retribution (Whenever a creature you control dies, put a +1/+1 counter on this creature.)
At the beginning of your upkeep, sacrifice a creature. This creature's power and toughness are each equal to the number of creature cards in your graveyard.