Con
Arms of Hadar
1st-level Conjuration · XPHB, p. 243
Casting Time1 action
Range10 feet
ComponentsV, S
DurationInstantaneous
Saving Throwstrength
Damage Typenecrotic
Description
Invoking Hadar, you cause tendrils to erupt from yourself. Each creature in a 10-foot Emanation [Area of Effect] originating from you makes a Strength saving throw. On a failed save, a target takes 2d6 Necrotic damage and can't take Reactions until the start of its next turn. On a successful save, a target takes half as much damage only.
At Higher Levels
Using a Higher-Level Spell Slot: The damage increases by 2d6 for each spell slot level above 1.