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 your library and put that card on top of it.
![Merrow Harbinger [Lorwyn] | Ghost Quarter Games](http://cdn.shopify.com/s/files/1/0522/4051/5237/products/f79b7f84-b767-5c91-aba3-129eef4a8b96_516d6f88-d255-4d30-be04-664bddb54625.jpg?v=1635909703)
