Dispel Oxygen

You erase all oxygen within range, centered on you. No breathable air can exist within range for the duration. Any creature which relies on oxygen/air to breathe will start to suffocate unless it can hold its breath. You have disadvantage on saves made to maintain concentration on this spell.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, its range increases by 10 feet for each level level above 4th.