The Lonesome Stair

Lonesome Stair comes into play tapped.
When Lonesome Stair comes into play, sacrifice
unless you sacrifice a Forest or Swamp.
{t}: Add {b} or {g}.
Cards that are exiled cannot leave exile until after
the end of the turn in which they were exiled.
"They seem harmless, but a if a searcher climbs them,
they are cursed not to find what they wish."