Sigil Of The Five Wardens

A Small disc the size of a palm. You find the disc with 1d4+1 charges. As an action you may extend one charge to cast Spirit Guardian at 5th level with a spell save DC of 17. When you expend the last charge of Sigil Of The Five Wardens it teleports away from the user to an unknown location. Where it takes five moon cycles to recharge.
They protected their mistress with their lives and continue to in their death.