This could be like a relic or amulet pr maybe a ring of sorts.
the name of the item could be Guardians of the Underworld or Guardians of the Dead.
description: Uroboruuk binded the souls of the three guardians of the underworld, granting him dominion over them and the dead.
This is a Necromancer amulet, that is purely pet based. you a + 1 summon limit to skeletons, and other necromancer bonuses and other pet bonuses like OA and damage, and flat vitality damage.
main power: Summon the spirits of The Guardians, making them fight for you.
Their three spirits: first one is a champion, second is ranged shooter, and third is a mage
they all deal vitality and are permanent.
What do you guys think?