Was Rude In A Way Crossword Clue, Exploding Basketballs In Public Prank!, 26.12 MB, 19:01, 1,822,864, D’Aydrian Harding, 2022-06-08T00:00:14.000000Z, 19, Mud City Crossword - WordMint, wordmint.com, 816 x 957, png, crossword wordmint, 20, was-rude-in-a-way-crossword-clue, KAMPION So towards the end of the game there is a shop that sells a mystery key for 600g. I figured that the obvious door that it opens would be the toriel door in snowdin and although it has a unique interaction; The key does not open it. I can't think of anywhere else it could be used for. Undertale > general discussions > topic details. Nejihyuga900 6 years ago #8. The mystery key only unlocks mettaton's house next to napstablook's house. You could also examine the mysterious door with the mystery key but the key doesn't unlock that door. The mysterious door can only be unlocked if you avoided all the special thanks kickstarter names in the credits of the true pacifist ending...