Question 1: Can you have more than one Challenge up at once? Example: I challenge big bad guy and and then next round challenge big bad guy's crony.
Question 2: The Honor Guard has a Sworn Defense ability that allows him/her to pick an ally when challenging. As long as he/she's next to that ally he takes a -1 penalty to AC and gives it to the ally. Does this stack if there are more than one opponent challenged? Can I choose more than one Sworn Defense?
Thank you
Answer 1: No, they can't. The text of challenge doesn't go out of its way to make this point clear, but it's still pretty obvious this is ability is supposed to be one opponent at a time.
Answer 2: Moot. If they can't have more than one challenge at a time then there are no stacking bonuses, and that means they can't have more than one sworn defense at a time either.