Corrosive Aura (5e Spell)
From D&D Wiki
|Casting time:||1 action|
|Duration:||Concentration, up to 1 minute|
A corrosive green mist pours off from you in an aura with a 10 foot radius. The area within the aura is lightly obscured. Each creature within the aura when it appears must make a Constitution saving throw. A target takes 4d8 acid damage on a failed save, or half as much damage on a successful one. Any creature that moves within the aura for the first time on a turn or ends its turn there must also make this saving throw at that time.
At Higher Levels. When you cast this spell using a spell slot of 5th or higher the damage increases by 1d8 for each slot above 4th.