While attuned the arm can create a shield at will (acts like a normal shield) +2AC
While attuned can use a bonus action to deploy a magical rune into the ground to create a barrier in front of you that is 5 feet wide and 5 feet tall.
While behind the barrier it gives three-fourths cover = +5 to AC and Dex saving throws.
You can use a bonus action to redeploy a magical rune into the ground to move the barrier.
You Maye redeploy the barrier = proficiency bonus.
The barrier last 1 minute, it has HP=(your level x 10), 14 AC, Disadvantage to Dex saving throws and advantage to Str saving throws.
Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it.
Notes: Charge = proficiency Bonus, The welders arm must be amputated for attunement
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