Wondrous Item, artifact
Arm prosthetic given to Joanna after the incident. Joanna being herself modified it to give her as many advantages she could get on it.
Notes: Damage: Bludgeoning, Resistance: Damage from Spells, Resistance: Bludgeoning, Piercing, and Slashing from Nonmagical Attacks, Advantage: Sleight of Hand, Feat: Grappler, Vulnerability: Cold, Vulnerability: Acid