Khahilgo, the sentinel

Defender
When Khahilgo enters the battlefield, each
opponent chooses a basic land in secret. All
lands of the revealed colors are exiled. You may
cast lands exiled this way as your own.
If you own 5 lands of each color, Khahilgo's
power and toughness switch, and he loses
defender. Khahilgo gains indestructible,
trample and plainswalk.