Frostspark Bomb
5-level Evocation
Casting Time: 1 Action
Range/Area: 120 ft
Components: Verbal, Somatic
Duration: Instantaneous
A stroke of translucent-blue lightning shoots from your pointing finger to a point you choose within range then blossoms silently into a sphere of cold lightning.
Each creature in a 20-foot radius must make a Dexterity saving throw.
A target takes 8d6 lightning + 7d6 cold damage on a failed save, their movement speed is lowered by half, and flying creatures lose their ability to fly. This lasts until the target finishes a long rest.
Ascended Spell. This spell costs 2 Spell slots to cast. A 5th-level spell slot and a 4th-level spell slot.