Uso, Living disaster

Whenever a land enters the battlefield under your control, put a blob counter on Uso, then you may create one 0/0 green and black ooze creature
token, and put +1/+1 counters on it equal to the number of blob counters on Uso
Sacrifice any number of oozes: Put a creature
with converted mana cost X or less from your graveyard onto the battlefield, where X is the
total power of the sacrificed oozes