Roln'gur

Roln'gur, Blade-bound to the Terrace, is a Taken Knight champion of Xivu Arath and the Taken field commander of the Synchysis mission in Riven's Lair. It first appeared in Season of the Wish, and it rotates as a boss in Riven's Lair and The Coil.

Roln'gur has an immunity shield that blocks all damage. It breaks when a Guardian kills the three Wardweavers, and Petra Venj directs the fight. Players also take the Pervading Darkness debuff, which kills at 10 stacks. Stepping on pools of Light clears it, but it comes back, so it has to be managed through the fight.