Name	Gate Seal
Level	4
School	Abjuration
Time	1 action
Range	60 feet
Componenents	V, S, M (a broken portal key, which the spell consumes)
Duration	24 hours
Classes	Sorcerer, Warlock, Wizard
Text	You fortify the fabric of the planes in a 30-foot cube you can see within range. Within that area, portals close and can't be opened for the duration. Spells and other effects that allow planar travel or open portals, such as gate or plane shift, fail if used to enter or leave the area. The cube is stationary. At Higher Levels: When you cast this spell using a spell slot of 6th level or higher, the spell lasts until dispelled. Source: Planescape: Adventures in the Multiverse - Sigil and the Outlands p. 12