The Tempered Interference-Negating Helmet is a level-40 plate helmet crafted with Blacksmithing in World of Warcraft Classic: Season of Discovery. To make it, reach 225 Blacksmithing, obtain its plans from Ziri “The Wrench” Littlesprocket after completing Gnomeregan’s crafting quest chain, and gather four types of materials. Its 10-second active effect grants resistance and melee attack speed but slows your movement.
Helmet stats and active effect
The helmet requires character level 40 and Blacksmithing skill 225. Both item references list +20 Strength, +14 Stamina, and +1% critical strike chance for spells and attacks. Its armor value is inconsistent: Warcraft Wiki lists 420, while Wowhead lists 426; neither figure can be confirmed here as the authoritative current value.
Using the helmet’s active effect reduces your movement speed by 20%, increases resistance to all schools by 50, and increases melee attack speed by 20% for 10 seconds. The effect has a 10-minute cooldown. Warcraft Wiki records that, since patch 1.15.7 (April 8, 2025), the active effects on crafted Gnomeregan helms cannot be used by characters above level 59. The item was added in patch 1.15.1 on February 6, 2024.
Materials required to craft it
At Blacksmithing 225, the recipe requires:
- 25 Mithril Bars
- 4 Low-Background Truesilver Plates
- 1 Hyperconductive Arcano-Filament
- 2 Faintly Glowing Leather
These quantities are listed on Warcraft Wiki’s plans entry. The plans are sold by Ziri “The Wrench” Littlesprocket in Gnomeregan, but only after you complete the Gnomeregan crafting quest chain.
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How to unlock the plans
The plans are gated behind the Gnomeregan crafting quest chain rather than being available from the vendor immediately. A Warcraft Tavern walkthrough describes a route involving a Grime-Encrusted Salvage, a corroded G-7 C.O.R.E. processor, beacon-related items collected across several zones, and a return to Gnomeregan.
Use that walkthrough as an orientation, not as a guaranteed current checklist: quest steps and item drops can change, and the available references do not establish every exact step or drop condition. Once you have finished the chain, return to Gnomeregan and check Ziri’s inventory for the plans. Learn them, then craft the helmet with the listed skill and materials.
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Is the helmet usable above level 59?
Warcraft Wiki’s patch history says that characters above level 59 cannot use the active effects on crafted Gnomeregan helms. This restriction concerns the active effect; the item’s level requirement is 40. If you are playing a character above level 59, do not count on the resistance and melee attack-speed activation being available.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Item flavor text
The helmet’s flavor text reads: “Guaranteed to protect your brain from all threats, physical and otherwise!”
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