As a side note I had to use my teleporter stones to get past the last wall of spikes. I don't know if I should have had to, or if I missed something.
Every wall of spikes stands for a member of the black ring. I think you have missed a member.
Here can you see the ways to the five members:
Here is a map of the last maze in the north.
P.S. Both pictures are from Kiya.