Holy Aura

Creatures of your choice in the emanation have advantage on saving throws, and attack rolls against them have disadvantage. When a Fiend or Undead hits an affected creature with a melee attack, the attacker must make a CON save or be blinded until the end of its next turn.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.