Amulet of the Split Mind

This amulet allows you to concentrate on two spells at once.

once per day As an action you may choose to split your mind into two separate consciousness. You may cast a concentration spell with the casting time of one action or bonus action upon activation of the amulet. 

upon activation you lose any source of advantage, and gain disadvantage to any rolls to maintain concentration.

At the end of each of your turns that the amulet is active you take 2d10 psychic damage that can’t be resisted or reduced by any source.

you may deactivate the amulet as an action. The spell cast upon activation is the spell that loses concentration.