Black Benediction

Allies of your choice in the emanation gain advantage on saving throws against curses, fear, poison, disease, and necrotic effects. When an affected ally succeeds on such a save, one hostile creature of your choice in the emanation takes necrotic damage equal to your INT modifier.

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