Wondrous Item, rare (requires attunement by a druid or wizard)
This amulet hold the soul of an old wizard. His soul can concentrate on a spell for you. Twice per long rest, you can cast a concentration spell with the amulet. The amulet will then concentrate on this spell until you end it or until it ends. You can't concentrate on any spell while the amulet is already concentrating on a spell and the amulet can not concentrate on two spells at once. The amulet can be destroyed to end the concentration, but the holder taking damage won't affect the concentration.
Debuff???
*WIP
Notes: druid or wizard