Amulet of concentration

forged form wizards of a lost age. this amulet can hold 1 concentration spell in it. it takes 1 bonus action to cat or remove a concentration spell from the amulet. and the amulet has 4 charges which you can,

. use 1 charge to add a concentration spell to the amulet.

. use 1 charge to remove the concentration spell from the amulet. 

Notes: Creation, Damage, Control, Communication, Buff, Debuff, Detection, Combat, Deception, Jewelry, evocation, divination, enchantment