Kha'Zix, the Voidreaver

Allegiance - The Void (Whenever a creature
with Allegiance - The Void enters the battlefield under your control, target creature gets
-0 /-1 until end of turn.)
{b}{u}: Kha'Zix, the Voidreaver gains your choice of a flying, first strike, deathtouch or +1/+1 counter.