Kayn, The Shadow Reaper

Exploit (You must choose one color when
exploiting a multicolored creature)
If Kayn exploits a Blue Creature,
all creatures your opponent's control get -X/-X
and he gains Deathtouch, Skulk, and Hexproof
If Kayn exploits a Red Creature,
Kayn gets +X/+X where X
was that creatures power
and gains Lifelink, Menace, and Vigilance