Frost Stinger

A frost stinger rises within 5 feet in the spell’s area. Creatures in the area must make a Dexterity saving throw; on a failure, they take 4d10 cold damage, or half the damage on a success.

The frost stinger is 10 feet tall and, while standing, creates a 20-foot aura, forcing creatures that enter or leave that area to make a Constitution saving throw; on a failure, they gain 1 reduction to their cold damage resistance.

For as long as concentration is maintained, you can cast new stingers, spending 1 fewer mana point for each stinger already standing. All stingers share the same Concentration, and creatures within the area of more than one stinger receive the resistance reduction cumulatively.

Each stinger is an inanimate object with AC 17 and 18 hit points.

At Higher Levels. When you cast this spell by spending Mana points equal to a 5th-level spell or higher, the damage increases by 1d10 for each spell level above 4th, the spell’s range and the stinger’s area increase by 5 feet, and the damage becomes magical.