A magical cage of bones erupts out of the ground to surround a creature on the ground you can see within range. The target must succeed on a Dexterity saving throw or be captured in the cage. While in the cage, the target is restrained and can’t use or be targeted by teleportation or interplanar travel spells and effects.    The cage has an AC equal to your spell save DC and 50 hit points. The cage takes only half the damage dealt to it and deals necrotic damage equal to that amount to the target, as it siphons life from the target.