Swamp Coliseum
Enchantment Land (Rare)

(Swamp Coliseum isn't a spell.)

Swamp Coliseum enters the battlefield tapped.

All creatures have Plainswalk.

Tap, Pay 1 life, Sacrifice Swamp Coliseum: Search your library for a Island or Swamp card and put it onto the battlefield, then shuffle your library.

Jason Tedin