Kha'Zix, the Voidreaver

Flash, haste
Whenever Kha'Zix, the Voidreaver destroys a creature
in combat, it gains keyword based on the color of that creature. Keywords are as follows:
white - lifelink, blue - flying, black - deathtouch,
red {dash} fisrt strike, green {dash} hexproof, and
colorless {dash} vigilance.
If that creature has multiple colors, choose one.
"Kill. Consume. Adapt." — Kha'Zix, the Voidreaver