All endgame boss drops are upgradeable up to +15.

Goddess of Wind Silva


Silva details!

Ruler of Ancient Darkness

Ruler details!

Goddess of Nihility Celia


Goddess of Despair Syrephis

Goddess of Dazzlement Shuriel

Zeitgeist


Stratus

Levigel

Atrophos

Banestone Hateheart

Valkryon

Groghtto

Belzac

Fel Conscript