4th-level necromancy
Secret Spell: Faithful of Neroth or val’Mordane bloodline
Casting Time: 1 action
Range: Touch
Components: V, S, M (A desiccated scarab beetle.)
Duration: Instantaneous

Your hand becomes shrouded in dark necromantic energy, allowing you to drain your target of vitality and cause one of its appendages to temporarily shrivel. Make a melee spell attack against the target; you have disadvantage if you try to touch a specific limb on the target’s body.

On a hit, the target takes 4d10 necrotic damage and must make a Constitution saving throw. On a successful saving throw, there is no additional effect.

On a failed saving throw, one of the creature’s limbs shrivels into a desiccated version of its former self. If you had disadvantage on your attack roll, the limb you touched is affected. Otherwise, determine the affected limb randomly.

All actions requiring the use of a desiccated limb suffer disadvantage. If a leg is shriveled, the target’s speed is halved. The affected limb can only be restored with a greater restoration, heal, lesser restoration, or regeneration.

At Higher Levels: When you cast this spell using a spell slot of 5th level or higher, the necrotic damage increases by 1d10 for each slot level above 4th.