Specifically, the Wits Glamour of the Knights of Avalon, Summon Sidhe on page 216 of the second playtest.
I'm considering making a character with the glamour, but as written, it seems impossibly vague. Not only the core book fails to really describe Seelie or Unseelie in any way, but the glamour itself doesn't give the slightest clue about the strength and abilities of the Sidhe it can summon. What does it mean to have one rank in that glamour? What does it mean to have five ranks? What kinds of Sidhe can you call upon and what are they willing to do for you?
I seem to recall that 1e outright refused to give even any statblocks for them and went on its way to explain how incredibly powerful and difficult to kill they are, so having something like that as a minor glamour seems a bit nuts. Especially considering that most minor glamours are sort of pathetically useless and a waste of a hero point.
So... is there something I'm not getting, or is it really just supposed to be a potentially incredibly powerful glamour that 100% relies on GM interpretation (and knowledge that doesn't even exist in the 2e core?)