Serpenteye said:And I suppose you are going to have objections to Sandorel and his followers summoning spellcasting outsiders using a spell with permanent duration, and then having them join in an ever larger circle to cast ever more powerful spells. That is my plan for world domination, you know...
That would break the game, I have no illusions about that, but Sandorel's abitions are so much greater than your average dungeon-delver's and he's doing it not to overcome random encounters with the party but to achieve a personal spiritual goal. Off course it's not going to be allowed, but it would be silly of me not to make the attempt.
I'm willing to adapt to the rest of the party, but I'm going to have to hear what the DM has to say first. I am finding your case very convincing.
Though I do find the summoning idea to be ingenous (it was something I hadn't considered), it probably falls into the same bucket of "broken" as the rest of your epic spells.