For the duration of the spell, a voluntary creature you touch turns into a cloud of mist along with its wearable possessions. The spell ends if the creature drops to 0 life points. Non-entity creatures are not affected by this effect.

Gaseous Form 5e

Level: 3rd

Classes: Warlock, Sorcerer, Wizard

Casting Time: 1 Action

Range: Touch

Components: V, S, M

Duration: Concentration, up to 1 hour

In this form, the only way the target can move is at a speed of 10 feet. The target can enter and occupy a space already occupied by an existing creature. It has resistance to non-magical damage and has an advantage when making Strength, Agility, and Constitution immunities.

The target can pass through small holes, slits, and even fissures, but he will treat liquid matter as a solid surface. The target does not fall and remains suspended in the air even when in a state of shock or incapacitation.

A target in cloud form cannot speak or manipulate objects, and cannot drop, use, or interact with objects it is carrying or holding. In addition, the target cannot attack or cast spells.