Weapon Refinery

Weapon Refinery is a mechanic in Fire Emblem Heroes.

Overview
The Weapon Refinery feature was introduced to Heroes in the Version 2.0 update.

The Weapon Refinery feature allows 5-Star Heroes to refine their weapons, granting their weapons bonus effects. Majority of weapons simply are given the option to grant the wielder fixed additional stats. Several weapons can be evolved, for example Eliwood can upgrade his base Durandal weapon into Brave Roy's Blazing Durandal. Staff Wielders who have learned their 5-Star staff weapon can imbue their staff with Wrathful Staff and Dazzling Staff passives. Other weapons, such as Hauteclere and Siegmund gain unique skill passives.

Function
Any Weapon Refinery performed requires Arena Medals which are acquired by winning Arena Battles and ranking in it each week. Refining and upgrading common weapons like Wo Dao, Silver Lance+, Assassin's Bow+ and Gronnowl+ require Refining Stones. Legendary weapon refining and upgrading requires Divine Dew.