Obstruction, or barricade, is a protection spell that creates an invisible barrier blocking corridors, tunnels, entrances, windows etc. The barrier is impenetrable from both sides by any creatures, items or even air. It may be broken only with a spell; if not dispelled or broken, it vanishes after less than a week.
|Magic cost:||4 or more|
|Effect:||Encloses a corridor, tunnel, portal, window, entrance, window etc with an impenetrable invisible barrier up to 3x3 meters, possible to open only with magic or by the caster's will. The barrier fades away after 1d6 days. Barriers enclosing wider clearances or lasting longer cost appropriately more.|
- Yennefer seemingly used this spell in Time of Contempt, to ensure that Ciri would not leave her room during the Thanedd meeting after her previous escapade to Hirundum.