Enervation

level 5 - necromancy

Casting Time: 1 action

Range: 60 feet

Components: V, S

Duration: Concentration, up to 1 minute

Description not available (not OGL).
But here is a summary:

The target must succeed on a Dex. save or take 4d8 necrotic damage each turn (+1d8/lvl).

Sorcerer

Warlock

Wizard

Xanathar´s Guide to Everything