Fountain of Necrotic Might

Update 12
Raid loot acquired prior to the release of Update 12 can be upgraded by inserting the item and 5 Shreds of Tapestry into the Fountain.'''


 * Introduced in Update 12, it is now possible to upgrade named treasure from Ascension Chamber raid.
 * Gather Seals of the Black Abbot from playing Hard or Elite difficulty.
 * Place a seal and the named item in the Fountain to upgrade the named item to a more powerful form.
 * You can preview the available upgrades by visiting the fountain and clicking the list interface.
 * Most existing items can be changed into the Update 12 upgradeable versions by inserting the item and 5 Shreds of Tapestry into the Fountain.'''
 * Be warned not all "upgradeable" loot are necessarily an "upgrade" from the pre Update 12 versions. Review the stats of the old versus new versions in the Ascension Chamber loot history page to be sure you wish to get the new version before you do so.
 * Warning: When converting old versions of items into new versions - if the item is exclusive, the upgrade won't immediately work. It will instead destroy the item and generate an "essence" of the item, which will go into your ingredient bag. You then need to take the essence out of your bag, then place it back into the altar, to get the new version of your item.

Update 23
It is possible to add augment slots to the quest and raid items from the epic items.

Fountain of Necrotic Might

 * Location: Upper Necropolis


 * Used to upgrade items obtained from Ascension Chamber, by combining them with a Seal of the Black Abbot.
 * Used to upgrade items obtained from Ascension Chamber, by combining them with a Seal of the Black Abbot.


 * Used to add Augment Slots to items from Necro IV quests and the raid, by spending 120 Epic Tapestry Shreds (primary augment) or Masterwork Tapestry Shreds (secondary augment).
 * Used to add Augment Slots to items from Necro IV quests and the raid, by spending 120 Epic Tapestry Shreds (primary augment) or Masterwork Tapestry Shreds (secondary augment).
 * Used to add Augment Slots to items from Necro IV quests and the raid, by spending 120 Epic Tapestry Shreds (primary augment) or Masterwork Tapestry Shreds (secondary augment).

Fountain of Necrotic Might Upgrades
For reference on the pre-U12 stats, see Ascension Chamber loot history.


 * For all items with clicky charges except the Litany of the Dead and Purging the Pantheon, the altar claims the items gain more charges than they actually gain (the amount of extra charges you don't get is equal to the base amount). This is likely just a display error, but could be intended that they do gain these charges. Either way, its a bug.


 * Note: Upgrading the Quiver of Alacrity from the old version to the upgradable base version will destroy any arrows/bolts it contains at the time. Upgrading it to the 30% striding version does not affect its contents. (ref).