Boggart Harbinger 
Creature — Goblin Shaman
When this creature enters, you may search your library for a Goblin card, reveal it, then shuffle and put that card on top.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL