But sometimes, the portal spell is very helpful when enemies sneak up on your city (for example, emerging from a dungeon or teleporting), and your main hero is far away. You teleport to the city and defend it – sometimes, such defense (or lack thereof) of the castle by the main hero is key to victory (or defeat) in the entire game. And flight or dimension door sometimes help to overcome very strong monsters and obtain a powerful artifact (depending on the map), for example, Angel Wings, etc.