I agree with Debbie McCarthy on all she has said.
I enjoyed the addition of the Delvers and Algors. Two new races of beings to interact with the Human, Dwarf and Elf that we see in many stories today. Not to mention many new bad guys for us to root against.
I am looking for more along this storyline. I can see and hope that more can be filled in about the history of the Delver and this magic.