The Inner Room of Karubiat Elesis

The Stone Rings from Above

""The final barrier echoes three again
The number of dragons, you see
Two clues are seen but unknown already
And the last is the curse of milady"

Solution Below

Previous clues were "Death, the final arbiter..." (DEATH) and "water above all..." (WATER). Last is the curse of lycanthropy (MOON). Symbols arranged correctly on the wheels gives the answer.