The Shredder

Trample, Deathtouch, Ninjitsu {2}{b}{b}{b}
When The Shredder deals combat damage to a player you may put {x} -1/-1 on target creature , where {x} is equal to the number of Ninja creatures on the battlefield.
{b}{b}Pay {3} life: Put a 2/2 Ninja creature token onto the battlefield.
The Shredder may be cast from your graveyard.
You fight well... in the old style. But you've caused me enough trouble. Now you face: the Shredder.