Where in the World is Witch Teresenda?

No one can tell where Witch Teresenda is: not her cat, not her broom, not her tree. Many knew where she used to be: at home, attending her heart. A chosen few could also tell where her home is… or was.  A short time after Witch Teresenda went missing, her home began to show itself in the most odd places, like some unexpected guest, but a noble and somber one. Weeping, cries and many strange sounds and lights made the place uncanny even when Teresenda was there. Now the house is even darker, more forlorn and discomforting. Many murderhobos tried to rob it. Many bishops tried to hallow it. Many warlocks tried to subdue it. The house comes, stays a while, then vanishes. Whoever got in is lost forever.  And you? Can you discover the house's secrets before vanishing with it?