An immobile, glass like, cube-shaped prison composed of magical force springs into existence around an area you choose within range. The prison can be a cage or a solid box, as you choose. The cage can be shrunk or enlarged at the whim of the caster, being the size of a bottle, or the size of a room.
A prison in the shape of a box, creating a solid barrier that prevents any matter from passing through it and blocking any spells cast into or out from the area.
IMPORTANT: this spell can only be cast on creatures that are critically wounded (5% of their max hp)
When you cast the spell, a single creature that the caster touches is trapped. Creatures too large to fit inside the area must make a con saving throw, on success they are pushed away from the center of the area until they are completely outside the area. On failure, the prisons barrier will slowly warp to swallow them inside of it.
A creature inside the cage can't leave it by nonmagical means. If the creature tries to use teleportation or interplanar travel to leave the cage, it will drain the mana from said spell, feeding into the containment runes/spell.The cage also extends into the Ethereal Plane, blocking ethereal travel.
This spell can't be dispelled by dispel magic.