Doomchains

As an action; calling upon the boon of Ara'Uul - the keeper beyond the Veil - who guards the chains of existence, the chain tattoo upon the caster's arm crawls down the caster's hand, summoning a colour-shifting and black, translucent chain which whips towards the target.
Starting at 1st level, if the target is or becomes unconscious and comes from a different plane, it will be banished from its current plane into the Chain Realm, where Ara'Uul will decide the target's fate. Upon a save by the target, the chains dissolve upon impact in a cloud of black smoke, inflicting no harm at lower spell levels. At higher levels, a failed impact will still dissolve the chains but they instead erupt in purple magical sparks, causing some damage.