Jonas nodded as he too had studied the map and he told them, "Let's use the underground first and if it's too dangerous, we can just teleport to Cassy's Divine Space..."
Cassy then coughed a little embarrassed and she told them, "That's not going to be possible unfortunately, my Divine Mage System just warned me that once we enter the island we won't be able to teleport to my Divine Space anymore and that's until we find the first power stone and that this island is linked to my Divine Space."
Jonas didn't expect this and so he said to everyone, "Well then, I guessed it will be the same for James, and for our means of communication…So everyone, before we go in, let's warned our friends and families that we won't be available for the next few days and then grab everything you want to bring with us."
Everyone teleported back to Cassy's divine space and they all did as Jonas advised.