Wave of Corruption

  A wave of entropic, oily energy ripples outward from you in a 30-foot radius centered on you. Each creature in the area must make a Constitution saving throw. On a failed save, a creature takes 5d8 Necrotic damage and has Disadvantage on the next saving throw it makes before the end of your next turn. On a successful save, a creature takes half as much damage.

• Object Corruption: Each unattended nonmagical object in the area takes 5d8 Necrotic damage. Nonmagical food and drink in the area is instantly fouled and rendered unpalatable.
• Corrupt Consumables: If a creature in the area fails its saving throw, one random magic consumable (such as a potion or scroll) in its possession is suppressed and cannot be used until the end of its next turn.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 3.