Aatrox, the Darkin Blade

Darkin Hemomancy — As Aatrox, the Darkin
Blade enters, discard any number of creature cards.
It enters with a flying counter on it if a card
discarded this way has flying. The same is true for
first strike, double strike, deathtouch, hexproof,
haste, indestructible, lifelink, menace, reach,
trample, and vigilance.

The World Ender — When Aatrox, the Darkin
Blade enters, draw a card for each counter on it.