I would suggest to anybody reading this that completing every subquest and going to every part of rivellon before going to stormist castle.(or at least be level 25+) this way you will be very powerful and can work all the way through ionas dungeon without a problem, then go find zandalor and you can get your teleporter stones back. saves beeing low level and going straight into the castle and loosing them. then having to make life very difficult for yourself in the dungeons (which is what I did 1st time round).