(Waterveil Ruins isn't a spell.)

When Waterveil Ruins enters the battlefield, you lose 1 life unless you reveal a monocolored card from your hand.

Waterveil Ruins is indestructible. (Destroy effects and lethal damage don't destroy it.)

: Add  or to your mana pool.

: Add  to your mana pool. Put Waterveil Ruins on top of your library.