Warriors of an ancient battle used to wear these metal identification tags on the battlefield. The tags on this necklace can be used to call on the spirits of these warriors for aid in battle. 

This necklace has 3 charges. While attuned to it, you can use an action to expend 1 or more of its charges to cast the Spirit Guardians spell from it (save DC 15). For 1 charge, you cast the 3rd-level version of the spell. You can increase the spell slot level by one for each additional charge you expend.

The necklace regains 1 expended charge daily at dawn. If you expend the necklace's last charge, roll a d20. On a 1, you take 5d8 Necrotic damage and the necklace disintegrates as the warrior spirits become mad and escape.  

Notes: Damage, Combat, Jewelry