Dragon Net

A Golden Net conjures itself around a Large or larger target within range.  The target must make a Charisma saving through or be restrained for 1 Minute.  While restrained in this way the target has resistance to all attack damage and spells used against it.  

A creature inside the net can't leave it by non magical means. If the creature tries to use teleportation or inter-planar travel to leave the cage, it must first make a Charisma saving throw. On a success, the creature can use that magic to exit the cage. On a failure, the creature can't escape the net and wastes the use of the spell or effect. The net also extends into the Ethereal Plane, blocking ethereal travel.

This spell can't be dispelled by dispel magic.