Duskblade Assassin

Shroud, cripple (Whenever a creature with cripple deals damage to a creature or player, it cripples it. Crippled creatures, until the end of its controller's next turn, cannot be regenerated and any marked damage is not removed. Crippled players cannot gain life until the end of their turn.)
{t}: Duskblade Assassin deal 2 damage to target creature you don't control.
"Each time you see those scars remember the mistake you made, and don't make it again."