Aatrox, The Darkin Blade

Lifesteal, Menace, Trample
If another darkin creature enters the battlefield
under your control discard cards equal to
the amount of darkins you control.
At the beginning of your endstep each darkin you control fights any creature. If you have no cards
in your hand, each darkin you control deals
damage equal to their power to any creature.
Aatrox, The Darkin Blade gains +1/+1 any time
you gain health.