This metallic arm replaces one of your own arms through a painful process of dismemberment of the natural arm and magical attaching of the mithral one. While the arm remains attached you gain a melee attack, the ability to cast a number of spells, and additionally a +2 bonus to spell attacks, save DCs, and armor class.
The arm has 20 charges for the following properties and regains expended charges daily at dawn.
Melee Attack. The arm can be used by the wearer to make a melee attack, which is automatically assumed proficient. It does a base damage of 2d6 + 2 and also provides a +2 bonus to attack rolls made using the arm.
Power Strike. When you hit with a melee attack using the arm, you can expend 1 charge to deal an extra 1d6 lightning damage to the target.
Spells. You can use an action to expend 2 or more of its charges to cast one of the following spells from it, using your spell save DC and spell attack bonus:
- Levitate (2 charges)
- Lightning Bolt (5th-level version, 5 charges)
- Shatter (3rd-level version, 3 charges)
- Stoneskin (4 charges)
Notes: Damage: Lightning, Bonus: Armor Class, Bonus: Spell Attacks, Bonus: Spell Save DC, any spellcaster with at least one 4th level spell slot, Damage, Control, Combat, Warding
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