Merrow Harbinger 73 (Lorwyn)

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) When this creature enters, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top.

NM - $4.90
LP - $3.90
MP - $3.00
HP - $2.00
DMG - $1.00