Zoolander+1 - Blue Dragon Slayer Shield
Wondrous item, very rare (requires attunement)

This shield is made from the scale of an ancient blue dragon. It has a rune burned into its outward-facing side. A character who examines the rune and succeeds on a DC 20 Intelligence (History) check recognizes it as an uven (“enemy” in Giant) rune that confers great power.

While holding the shield, you benefit from the following properties.

Storm Friend. You are immune to lightning damage.

Brilliant Rebuke. Immediately after a creature hits you with a melee attack, you can use your reaction to deal 3d6 radiant damage to that creature.

Bane. You can cast the bane spell from the shield (save DC 17). The spell does not require concentration and lasts for 1 minute. Once you cast the spell from the shield, you can’t do so again until you finish a short or long rest.

Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it.

Notes: Bonus: Armor Class, Immunity: Lightning, Damage: Radiant