Homebrew by HankMcShank

Breathe Vermin

1-level Conjuration

You breathe forth a swarm of vermin, stinging, biting and clawing at everything in their path. Each creature in a 15-foot cone must make a Dexterity saving throw. A creature takes 3d6 piercing damage on a failed save, or half as much damage on a successful one. Whether or not the spell deals damage, the vermin turn to dust afterwards.
At higher levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.