Duskblade Assassin

Stealth (when a minion with stealth has a +1/+1 counter on it, it can't attack, it can't block, and it has shroud)
Duskblade Assassin enter the battlefield with two +1/+1 counter on it.
{t}{2}{b}, remove a +1/+1 counter from Duskblade Assassin: Target creature gets -4/-4 until end of turn.