7th-level Spell: Devouring Mist

Whispering (Necromancy)

You transform into a 15-foot radius swirling cloud of blood mist. While in this form, you have a 60-foot flying speed and you have resistance to all damage besides radiant, force, and psychic damage, but cannot take any actions.
The first time a creature is engulfed within the blood mist (including from your movement while transformed), it must make a Constitution saving throw. On a failure, they take 6d8 necrotic damage, and you regain 10 hit points. On a success, they take half as much damage, and you regain only 5 hit points. You can regain a total of 50 hit points, after which you do not regain additional hit points from this effect.
At the start of your next turn, you reform into your previous form.
Source: KCC

• Casting Time: 1 action
• Range: 60 feet
• Components: S, M (a splash of your blood worth at least 15 hit points, which the spell consumes)
• Duration: 1 round
• Ritual: No