Rupturing Curse

You focus your magic to shatter the body of your foe. Choose one creature you can see within range; it must succeed on a Constitution saving throw or take 3d6 piercing damage and be knocked prone by the pain.

In addition, if the target takes bludgeoning damage equal to 5 times its Constitution modifier (minimum of 5) or more in a single turn, its skeleton shatters, reducing its speed to 0 for the duration of the spell. If it does not take such damage before the start of its next turn, the spell ends. A creature without bones is immune to this effect.

Using a Higher-Level Spell Slot. The piercing damage increases by 2d6 for each spell slot level above 2.

Steinhardt's Guide to the Eldritch Hunt 192

V, S

Related Discipline

Warlock, Wizard

Related School

Evocation [Osteomancy]

Effect Duration

Concentration, Up to 1 Minute

Effect Casting Time

Action

Range

60 feet

Level

Level 2