What are some good complications for a fantasy story?

Answer 1

The complication must be logical to the story, so you're going to have to invent it yourself. Think about what your characters want most, and start listing ideas for how those wants and desires can be thwarted -- those will be your complications.

Answer 2

Some good complications for a fantasy story could include a character discovering a hidden betrayal within their inner circle, an unexpected twist of fate that challenges the protagonist's beliefs, or a powerful antagonist who poses a threat to the protagonist's quest.