Shores of Muya Dol

Shores may only be cast if a pirate ship is on the battlefield. If another shore enters the battlefield
under your control, or you don't control a pirate ship, sacrifice this enchantment.
At the beginning of your upkeep you may search
your library for a basic land card and put it into
onto the battlefield. Shuffle your library if you searched it this way.
When creatures enter the battlefield under your control, they explore.