Event Horizon Halo

A swirling ring of dark matter and divine stellar slime forms around you.

For the duration: The area within 10 feet of you is difficult terrain for hostile creatures.

Whenever a hostile creature enters the area for the first time on a turn or starts its turn there, it takes 2d8 radiant damage and 2d8 poison damage. You gain resistance to force damage.

The halo resembles a miniature event horizon surrounded by orbiting droplets of glowing nebular plasma.

At Higher Levels. Both damage types increase by 1d8 when cast using a spell slot of 6th level or higher.