how do i upgrade the heirloom warglaive weapon in wow

To upgrade the heirloom warglaive in WoW, buy the weapon heirloom upgrade item called a Scabbard from the heirloom vendor, then use it from your inventory to upgrade the warglaive one step at a time. Blizzard says weapon heirlooms can only be upgraded with Scabbards, and you must apply them in order, not jump straight to a higher level.

How it works

• Open your Heirlooms collection.
• Buy the next weapon upgrade item from the heirloom vendor.
• Right-click the Scabbard in your bag.
• Select the heirloom warglaive you want to upgrade.

Important limits

• You can only upgrade heirlooms in Modern WoW, not Classic.

• Upgrades are sequential, so a lower-level warglaive must be upgraded step by step.

• The warglaive heirloom was added recently in the 2026 discussion, and players noted it upgrades through multiple steps before reaching its cap.

Where to get it

Heirloom vendors sell the weapon upgrade items, and one guide notes the Horde vendor can be found in Orgrimmar or Undercity, while Alliance players can use the Ironforge vendor.

Practical tip

If you want the warglaive look while leveling, upgrading the heirloom keeps it scaling with your character, but you still need to keep applying the next Scabbard when you reach each upgrade stage.

TL;DR: buy a weapon heirloom Scabbard , right-click it, and apply it to the heirloom warglaive in your Heirlooms tab, repeating one step at a time.