Feral Deceiver 

Creature — Spirit
: Look at the top card of your library.
: Reveal the top card of your library. If it's a land card, this creature gets +2/+2 and gains trample until end of turn. Activate only once each turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL