Symbiote Slime

Kicker - Exile X cards from your graveyard.
Symbiote Slime enters the battlefield with an additional X +1/+1 counters. If it was kicked return each creature with converted mana cost X or less from your graveyard to the battlefield.
When Symbiote Slime enters the battlefield it fights target creature an opponent controls.
"In the ooze, there is life. Also, death."