Telesor's Windrazor

Dark energy swirls around your blade as you aim it at a creature of your choice that you can see in range. Deep slashes appear on the target's skin and old wounds reopen.

The target must make a Dexterity saving throw. The target takes 10D6 necrotic damage on a failed save, or half as much damage on a successful save.

This spell has no effect on Undead or Constructs.

If you target a plant creature or a magical plant, it makes the saving throw with disadvantage, and the spell deals maximum damage.

At higher levels: When you cast this spell using a spell slot of 5th level or higher, the damage is increased by 1D6 for each slot level above 4th.