Arms of Hadar

level 1 - conjuration
Casting Time: 1 action
Range: Self (10-foot radius)
Components: V, S
Duration: Instantaneous

Description not available (not OGL). Summary:

Creatures in a 10-ft radius must succeed on a Str. save or take 2d6 necrotic damage (damage/lvl)
Warlock
Player´s Handbook