You force a target into a shimmering bubble, while inside the target cannot be attacked with melee or with ranged attack. However, spell or abilities that don't rely on projectiles or touch may effect the target (ex: Cloudkill).
On the target's turns they may reroll their defensive roll to escape the bubble. Every round they spend inside the bubble shrinks, dealing bludgeoning damage to the target.
The target is restrained and floats slightly above the ground.
A radiant, multi-hued bubble envelops the target, its glossy surface shimmering with shifting colors.