Rune Arm

Rune Arm (or Arm Cannon) is new kind of equipment implemented with Update 11 and the Artificer class. It goes into secondary weapon/off hand slot and requires Artificer Rune Arm Use feat (Artificer level 2 class feat) to use.

Rune Arms can be used in the offhand (with crossbow). The Rune arm has unique magical properties such as: adding magical weapon damage to the main hand, magical enhancements, and being craftable (CAUTION: adding crafting enhancements raises the minimum level requirement significantly).

The Rune Arm also functions as a weapon as a free action (not restricting the users abilty to cast or attack). The weapon uses Charges with five tiers, and these charges increase in damage the higher the tier (Rune Arms have a max tier level). Charges can be added standing still or while moving limited by the "Stable Charge Tier".

Rune Arms are currently only acquired by finishing certain quest chains.

How it works

 * Can be worn together with 1 handed weapons and crossbows (not bows)
 * Tapping the Alt button will start charging it up, tapping it again fires it.
 * You can use the rune arm use feat on your actionbar to make it keep autocharging.
 * Damage will be affected by Artificer level and charge tier.
 * Rune Arms will give a bonus elemental damage to the weapon in your main hand.
 * Prevents you from blocking.

List of named Rune Arms
Max Charge Tier 2:
 * Flicker - Shan to Kor
 * Flame Warden - Waterworks
 * Thought Spike - Korthos \ Redemption
 * Candlelight - Catacombs
 * Khyber's Fury - Tangleroot
 * Chulchannad's Claw - Carnival

Max Charge Tier 3:
 * The Pea Shooter - Red Fens
 * Coronach - Delera
 * Recoyle - Threnal
 * Trial by Fire - Attack on Stormreach
 * Chimera's Breath - Sentinels of Stormreach
 * The Devourer's Hunger - Cult of the Six
 * Hand of the Tombs - The Chamber of Raiyum
 * The Disciplinator - The Vault of Night (raid)

Max Charge Tier 4: Max Charge Tier 5:
 * Arcing Sky - Gianthold Tor (Blue Dragon Chest)
 * The Turmoil Within - Gianthold Tor (Black Dragon Chest)
 * Titan's Fist - The Twilight Forge (raid)
 * Tira's Splendor - Garamol (rare in Subterane)
 * Glorious Obscenity - Reign of Madness
 * Animus - Devil's Assault - Hard Difficulty, epic difficulty? (Lemure is a kind of Devil)
 * Lucid Dreams - Mindsunder Disc Chest
 * Toven's Hammer - The Master Artificer (raid)

Sharn Syndicate being the exception, which doesn't seem to award one Looted ones are unbound, while end rewards are bound * Except Korthos one, its unbound from end reward

Rune Arm crafting
One can craft enhancements, via Cannith Crafting system, on a Rune Arm as if it was a trinket