Proper Ending

With the dire knowledge that the world shall end in ice, you do what you can to prevent such fate from befalling your allies. As a bonus action, you can touch a dying creature or a creature that died in the past round. That creature is restored to life if dead, stabilizes, and is considered to have failed no death saving throws, but remains unconscious. The body must be relatively intact. This ability doesn’t function on decapitated or disintegrated creatures, for example.

As an action, you can concentrate on your own mortality in order to manifest a zone of cold in a 10-foot radius around you. Once manifested, the zone is stationary, and it lasts until you dismiss it as a bonus action, or you fall unconscious.

At the start of your turn, creatures in the zone take 1d6 cold damage. This increases to 2d6 at 5th level, 3d6 at 11th level, and 4d6 at 17th level. Creatures in the zone cannot heal or gain temporary hit points. Since you manifested this fragment of the world’s icy end, you are affected by the zone even if you are not inside it, and you cannot reduce the damage this power deals to you by any means. Other creatures’ resistances and immunities can still protect them.

Once you manifest this zone, you cannot use it again until you complete a long rest.