The vessel of estrode-RD

[peponas]

I am doing the epic cult sage or something quest chain and reached the part where it sends me into runic decent and find the vessel of estrode.
I strolled into RD for a while as a rogue but couldnt find much.ANyone can direct me to where i must go what i must do and what i will face?

[Solovick]

Yes wondering this too.

[Koe]

Last boss, after the Warden. Kill him, and there's a clickable. Spawns a big elite Satyr that hits hard.