Hello everyone!
I am going to DM in a few months and I have decided that a part of the main plot will be revolving around this Major Artifact, the Codex of the Infinite Planes. I really like this item, but I would like to change the catastrophes in order to make them more destructive in the area around the Codex (keeping effects like Fiendish Vengeance (Balor/Pit fiend summoning) or Zombie Apocalypse) and removing catastrophes which befall the user alone (like Formless and Ultimate Imprisonment). I have not many ideas, I just need these new affect areas of at least 10/15 miles radius around the Codex. Do you have any ideas?