(Timberland Ampitheater isn't a spell.)

Timberland Ampitheater enters the battlefield tapped unless you pay .

Timberland Ampitheater is indestructible. (Destroy effects and lethal damage don't destroy it.)

, Pay 1 life, Sacrifice Timberland Ampitheater: Search your library for a Mountain or Forest card and put it onto the battlefield, then shuffle your library.