POISONOUS BLADE

Evocation cantrip

Casting Time: 2 actions
Components: S, M (a weapon)
Duration: 1 round
Range: Self

You take the Attack action as part of the same action used to cast this spell against a creature within reach using the weapon provided as a material component. On a hit, you can create a 10-foot radius area centered on the target for the duration that causes any creature that ends its turn within that area to take poison damage equal to your spellcasting ability modifier. The area and the poison damage each increase by 5 feet and 1d8 at level 5 (15-foot, 1d8), 11 (20-foot, 2d8), and 17 (25-foot, 3d8).