The keep is no longer a gauntlet of ogres and cages. It is a library on fire. The dragon skeleton is gone, replaced by a spiral of scrying glass that shows you every death you will ever die.
If you are playing the edition specifically, this version includes: Dark Souls 2 Scholar of the First Sin v1.03.r.2...
The edition’s namesake, the Scholar of the First Sin (the NPC Aldia), is exclusive to this version. In v1.03.r.2, his dialogue is fully integrated. He acts as a philosophical counterweight to King Vendrick. While Vendrick sought power to break the cycle, Aldia sought truth beyond the dichotomy of Light and Dark. The keep is no longer a gauntlet of ogres and cages
You do not use it.