Cloudkill

5th level - Elemental (shadow or poison) or Spiritual (umbramancy)

Casting Time: 1 action
Range: 120 feet
Components: V, S
Duration: Concentration, up to 10 minutes

You create a sphere with a 20-foot radius made of a poisonous yellow-green mist, centred on a point of your choice within the spell’s range. The mist spreads, following the contours of corners. It persists for the duration of the spell or until a strong wind disperses it, ending the spell. The area is heavily obscured.

When a creature enters the magic area for the first time in a turn or begins its turn there, it must make a Constitution saving throw. The creature takes 5d8 lethal damage on a failed save, or half that damage on a successful save.

The creatures are affected even if they hold their breath or do not need to breathe.

The mist moves 10 feet away from you at the start of each of your turns, creeping along the ground. As the vapours are heavier than air, they sink to the lowest level of the ground, seeping out through any openings.

At Higher Levels. When you cast this spell using mana points equivalent to a 6th-level spell or higher, the damage increases by 1d8 for each level above the 5th.