(Waterveil Crater isn't a spell.) At the beginning of your end step, if you didn't cast any spells this turn, Waterveil Crater deals 1 damage to you. Waterveil Crater is indestructible. (Destroy effects and lethal damage don't destroy it.) , Pay 1 life, Sacrifice Waterveil Crater: Search your library for a Island or Mountain card and put it onto the battlefield, then shuffle your library.