I think keeping the com amulets in an dimensional item should be enough. if I remember correctly that would keep them offline

an interesting question would be if the tower warp works inter continentally as well. that could open the door for so many opportunities for trade, communication or even heists. if no one knows that he can be on the other continent then he would have a great alibi xD

its a great read that doesn't conform to all the usual fantasy tropes and is therefore far more interesting and refreshing. no sudden power surges, detailed explanations for magical items and spell structure keep it interesting :)

xp

exciting developments :)