Merrow Harbinger

Merrow Harbinger

Creature - Merfolk Wizard | Power/Toughness: 2 / 3 (CMC 4)
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
When Merrow Harbinger enters the battlefield, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top.