Blight of the Winter Court

You can use your pool of Fey Energy to harm, rather than heal. As a bonus action, by spending dice from the pool, you can deal necrotic damage to one creature you can see within 120 ft. The creature's maximum hit points are reduced by 1 per die spent.

If you are in the Winter Court of the Feywild, this replaces your Balm of the Summer Court entirely.