Fractured Shell

You touch a willing creature, forcing spiked bone plates to grow and pierce through its skin. It takes 1 point of piercing damage. For the duration of the spell, the first time each turn that the target is hit with a melee attack, the attacking creature takes 2d4 piercing damage.

Using a Higher-Level Spell Slot. The damage dealt to attacking creatures increases by 1d4 for each spell slot level above 1. If you use a spell slot of 5+, the spell doesn’t require concentration.

Steinhardt's Guide to the Eldritch Hunt 188

V, S, M

Material Components

a porcupine’s carapace

Related Discipline

Apothecary, Warlock, Wizard

Related School

Transmutation [Osteomancy]

Effect Duration

Concentration, Up to 10 Minutes

Effect Casting Time

Action

Range

Touch