Eris’ Heat Syphon

You begin to draw in all of the heat of creatures around you, slowly freezing them. Around you to a distance of 20 feet for the duration.

An affected creature's speed is halved in the area, and when the creature enters the area for the first time on a turn or starts its turn there, it must make a Constitution saving throw. On a failed save, the creature takes 4d4 cold damage. On a successful save, the creature takes half as much damage. Any time this spell deals damage, you heal half of the damage dealt.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 2d4 for each slot level above 5th.