Arcane Arm

A beautiful and ornate arm made out of rare metals and fine porcelain. It is host to a plethora of enchantments aimed at making the arm into a perfect replacement for a missing limb; mimicking the functionality of a normal arm and giving its user the same sensations they once lost. Arcane Arm is a powerful magical catalyst and works as a spellcasting focus. After attuning to this Arm, you can choose to activate one of the following enchantments: 

• Aegis Shield: The arm deploys a shimmering translucent barrier in the form of a shield. When this barrier is active the user's AC is increased by 2 as if they were using a normal shield. Additionally,  when the user is targeted by an attack, they may spend a spell slot as a reaction to intensify the barrier gaining an additional 5 bonus to their AC until the start of their next turn. 
• Spell Blade: The arm deploys a magical arcane blade capable of absorbing and releasing magic. The blade functions as a finesse weapon with a 1d8 hitdie. When the user casts a spell that deals damage, the blade will absorb any residual magic causing its next attack to deal an extra 1d8 damage of the same type as the spell.  
• Nether Grasp: The arm exerts a strong telekinetic force around a 60ft radius sphere allowing the user to move objects weighing no more than 1000 lb that aren't being worn or carried. In combat, you can use your action to lift one object and move or throw it up to 30 feet but not beyond the range of this effect.  In subsequent turns, you can use your action to continue to manipulate the same object or a different one. 

You can change the enchantment of the Arcane Arm after completing a long rest. 

Notes: spellcaster with a missing arm.