An immobile, invisible prison of magical force appears around an area within range. You choose whether it forms as a barred cage up to 20 feet on each side, or as a solid box up to 10 feet on each side. The barred cage traps creatures inside but has narrow gaps between the bars, while the solid box blocks matter and prevents spells from passing into or out of it.

Creatures fully inside the area are trapped. Creatures only partly inside, or too large to fit, are pushed outside the prison. A trapped creature cannot leave by nonmagical means. If it tries to escape using teleportation or planar travel, it must succeed on a Contesting Fortitude Roll. On a failure, the escape fails and the spell or effect is wasted. The prison also extends into the Ethereal Plane, blocking ethereal escape.

This spell cannot be removed by Dispel Magic, but it can be destroyed by casting Disintegrate using 7 Mana.