Shadow Veya (Second Form)

Shadow Veya or Shadow Tundilwen is Nocturnal's champion Veya Releth transformed into a warped and twisted husk of her former self; one that feels hate, embodies mystery, and has no sympathy. Nocturnal summons her to defend the Crystal Tower summit while she reforges the Heart of Transparent Law in order to rewrite reality.

Source: uesp.net.