(Deathly Verge isn't a spell.)

Deathly Verge enters the battlefield tapped unless you control three or more enchantments.

Deathly Verge is indestructible. (Destroy effects and lethal damage don't destroy it.)

, Pay 1 life, Sacrifice Deathly Verge: Search your library for a Plains or Swamp card and put it onto the battlefield, then shuffle your library.