A Portent of passage is an item created with the Divination skill, usable only in Daemonheim. It allows skill doors which require levels higher than the portent holder has to be passed, if they are within a certain range. The level boost is equal to 2 times the tier of the portent. The effect of the portent does stack with the effect of a potion. If a player fails to open the door, the portent will protect the player from damage; however, it will be consumed in the process.
Note that portents of passages only works on obstacles on the doors themselves; Puzzles that require a skill level higher than the player has cannot be passed with a portent of passage.