Ryuchi Cave

Ryuchi Cave enters the battlefield tapped.
{t}: Add mana of any color. You lose 1 life.
{3}{b/g}: Until end of turn, Ryuchi Cave becomes
a 3/3 black and green Snake creature with
deathtouch. It's still a land.
In order to be granted an audience with the White
Snake Sage, one must pass three trials...or be eaten.