Where is the horn of illomen on champions of norrath

enter the underwater cave. there is a broken portal. touch it. it will take you to a desert. play game from then on. you will go through the tower of clouds, where you will find lazlo you must then find the pieces to a raft ones u find them all you will go the the end of the ice get on the raft and go under the sea. fight the bad guys until you find a very large crab thing when u kill it it spits out the horn. use the portal close to u to teleport back to the waters edge islands