Homebrew
Nebula
5-level Evocation
Casting Time: 1 action
Range/Area: 120ft
Components: Verbal, Somatic, Material
Materials: 50 gold worth of star dust, which the spell consumes
Duration: concentration, up to 1 minute
Attack/Save: Dexterity
Damage/Effect: cold
A field of swirling, chilly stars burst from a point you can see within range to fill a 25-foot radius sphere for the duration. The stars spread around corners. When a creature enters the spell's area for the first time on a turn or starts its turn there it must make a Dexterity saving throw or take 5d10 cold damage, or half as much on a successful one. The area is heavily obscured and dispels the darkness spell if any part of their areas overlap. The nebula emits a bright light in a 40-foot radius and dim light for an additional 20 feet.
At higher levels: When you cast this spell using a spell slot of 6th level or higher, the radius of the nebula increases by 5 feet along with its damage increasing by 1d10 for each slot level above 5th.
Available for: Druid, Wizard