Back Door

This key may be put into any whole and turned, once turned if the user is thinking of place a door will appear at that location, a door will manifest at the key including a handle/knob, anyone can enter the door once it's open, it's the size of a tavern door, the person using the key cannot go anywhere they have not been to unless it's into their own mindscape(or any imagined realm), they can do as they please in their mind though the door and key will stay, if anyone other than the user enters the mindscape a door will appear parallel to the one being made acting like it would normally, the door will close if not manually shut in five minutes, if the other door is manifested in the middle of a town and not on any surface the back of the door will be all wood, the key can be used whenever though if it's used in combat it takes a full turn to manifest and open the door, they may use it as a bonus action though it will only manifest the door and the person cannot open it, if a non magic user(anything but druid, wizard, sorcerer, warlock, ect) uses this key they will have to do a roll on their lowest modifier(can be changed to any modifier the dm would prefer) if the user doesn't roll a 20 or higher(30 if absolutely needed) the door will go to a random place(chosen by dm) if a half magic user(duel classes) uses this key they will need to roll a 1 no matter what(modifier if the dm chooses) or it will go to a random location, any hole works though if used on a key hole the key won't work and normally won't fit

the key is an old rusted skeleton key, it's surprisingly not broken in any way