I finally finish the puzzle. A dais rises up from the floor with a magic egg inside. One has to reach down into the dais to acquire the egg. This is, of course, a trap, hence, I push Cesar away before he can stick his hand into the dais. Unfortunately, Mack Lir is the only one among us who can acquire the egg without sustaining permanent damage being as he is the only one with an affiliation with the moon. After removing the egg, he requests that I touch it. Touching the egg causes a vision to appear in my mind: that of how to combine this egg (associated with the moon) with the egg being acquired by Dr. Savage (associated with the sun).
Storm calls his brother and sets up to meet him at the Sidhe. Lenore's mother, The Morgan, wanted Lenore to bring her the egg. So, we convince Lenore to allow us to talk to her mother and explain the situation: we will give her the egg as soon as we are done with it.
The meeting with the Morgan went smoothly. She allowed us to put both the eggs together for the final vision that showed us where in the ocean the hidden island is: near Iceland and full of giants, both fire and ice. We then give both the eggs to one of Lenore's followers, who took them to the Morgan.
We are currently in Reykjavik, Iceland.