Corrupting Blade

As long as Corrupting Blade is equipped to a
player, you losses 5 life at the end of your turn.
{3} pay 3 life: equip Corrupting Blade to yourself.
Equipped player has +5/+0, deathtouch and may attack.
If you kill a creature, return it to the battlefield
under your control, you losse life equal to that
card converted mana cost.