I've seen isis, the sphinx, oakemir and the guy with the map. I answered the riddles but don't have what i need to get in-can't find second sea map guy talks about, and can't find anywhere else to go. Where do I go next, Skull Island? Where is it from Brimloch. Thanks

yep, you have to finish skull castle next. The island is near the bottom of the map in the next cove to the left of where you originally started.