Mikrom Sum

Mikrom Sum: Purple Dragon Knight Patron Vendor
Introduced in Update 14, one is able to upgrade and purchase various named items by spending ingredients gathered from Menace of the Underdark quests. However, all of these require "Oversword" status (375 points) on Purple Dragon Knights patron favor.

Upon reaching the favor status, you can preview the available upgrades and purchases by visiting an NPC called Mikrom Sum  and clicking the list interface.

Location
Eveningstar northern part, next to Battlemaster Dint, the favor representative.

Usage

 * Upgrade weapon items obtain from Caught in the Web, by combining them with Commendations of Heroism.
 * Upgrade Name armor obtain from Trial by Fury, The Deal and the Demon, Reclaiming the Rift
 * Purchase Cormyrian Green Dragon Armors, Cormyrian Red Dragon Armors

Attuned to Heroism upgrade

 * When an item is first upgraded, Attuned to Heroism becomes, Attuned by Heroism: Tier 1
 * Upgraded items retain their binding status; unbound BTCOE items will remain unbound and trade-able/auction-able after upgrading.

Cormyrian Dragon Armors purchase
Unlike Red Dragonscale Armors from Update 3 (The Vault of Night epic items), Cormyrian Red Armors don't require corresponding Black/Blue/White base armor.

Armor upgrades
Following named armors can be upgraded to become a part of the Eveningstar Commendation item sets.