Aegis of Balance

A gift was conveyed to the angel Seraphin by Jyra the God of Balance, a shield to protect and fight back against his enemies. This is Seraphin's most prized possession.

Enemies who's attack rolls are under the user's AC take 6 (1d12) lightning damage. This also enables the user to act out a reaction against the attacker:

Reaction
Blocking Retaliation. Bash the attacker, the enemy has disadvantage and -5 on their next attack roll. 1 charge per combat.