Kroxin, The Blood Artist

Menace
Whenever another creature dies, you may put a
+1/+1 on it and return it to the battlefield.
Creatures you control with a
+1/+1 counter on them don't have this ability.
{x}{b}{r}: This creature deals X damage to target creature.
As long as you control more creatures than your opponent, they cannot have more than 25 life.