You only draw the direction card if the situation requires a choice and a random direction.
2. Direction used if a random direction is called for. The direction marked
“1” is used, but in cases where only some directions are suitable, use
the lowest number that indicates an appropriate direction.
Some rooms state that the direction is “Towards the Cursed Room”;
in such cases use the suitable direction which is the fewest moves
from the Cursed Room. If there is no route to the Cursed Room, the
direction which would generate the most additional threats is used.
In the event that a room card is needed and the deck is
empty, shu e the room discards to form a new deck.
ImpsIn a room adjoining a room that contains a glyph or a wizard who has glyphs
Move into a random adjoining room that meets these criteria.
This would be the rule section in question. If only one room meets the criteria, then I wouldn't draw a location card, just move in the direction required. If several rooms meet the criteria, draw a card and move in the lowest marked direction. If you draw "Towards the cursed room" I'd do my best to meet both requirements. Moving into a room with a glpyh or wizard which represents the shortest route to the cursed room from the options that meet the criteria