Sign of Sealing
3rd-level abjuration (Artificer,Sorcerer,Wizard)
- Casting Time: 1 minute
- Range: 30 feet
- Components: V, S, M (a crushed emerald worth at least 100 gp, which the spell consumes)
- Duration: Permanent
You seal a door, chest, book, or other object that can be closed with a magical sigil that bars entry and prevents opening. The protected object can only be opened if broken, or with knock or dispel magic. However, if the object is forced open by any means (physical or magical), the sigil explodes in 30-foot radius for 10d4 force damage. A successful Dexterity saving throw halves the damage.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the amount of force damage increases by 1d4 per slot level above 3rd.