The Darkin Blade

Equipped creature gets +2/-1 and has Trample
and Haste.
Whenever equipped creature deals combat
damage to a player, sacrifice that creature, then
put a charge counter on The Darkin Blade. If
The Darkin Blade has three or more charge
counters, search your library for a card named
Aatrox, World Ender, put it onto the battlefield,
then exile The Darkin Blade.
Equip {1}