Archangel's Shard

The Archangel Shard is a painful, glowing brand that is bestowed only by an archangel, typically in a form reminiscent of the giving angel. Only the greatest champions of the heavens can receive this brand. It gives a +2 bonus to melee attacks and damage rolls, as well as an effect based on which angel it came from: 

Mael: Grants the bearer 3d8 Radiant damage to all attacks.

Ludociel: Grants the bearer an extra attack as a bonus action and +5 to movement speed.

Tarmiel: Grants the bearer 3d8 Cold damage to melee attacks, and they can breath underwater.

Sariel: Grants the bearer 3d8 Force damage to ranged attacks, once per short rest cast Thunderwave as a free action without expending a spell slot

Notes: Bonus: Magic, To attune to this item, one must be chosen by an archangel either as a celestial vassal or servant. You must succeed a DC 25 Constitution save or suffer 10d8 radiant damage.