(Tropical Precipice isn't a spell.)
At the beginning of your end step, if you didn't cast any spells this turn, Tropical Precipice deals 1 damage to you.
Tropical Precipice is indestructible. (Destroy effects and lethal damage don't destroy it.)
, Pay 1 life: Add
or
to your mana pool.
,
, Sacrifice Tropical Precipice: Draw a card.