The stunning conclusion to the epic.
When all the world's heroes assemble in Anyimar, the goal is simple. It won't be easy, but it feels straightforward. Defeat the last villain, go home, rebuild. Get back to debating whether they can forgive one another for all the wrongs they did.
For an Arbiter to defy another Arbiter, though, is to tear holes in causality. Inviting the same cataclysm that forced their ancestors to flee their homelands for these foreign shores. This the future they chose: to go their own ways, to pursue their own dreams, to refuse to go on being cogs in a monolithic ideological machine. The boundless power of magial is imagination given agency, and if they can't just obey one leader with one vision, they're going to have to compromise and work together as a team.
They come up with a solid plan, but it has unintended consequences...