Re-posted from the 2 Champs, 1 Chump Episode 47 thread. The topic is: can you choose to discard 2 power from your House in order to satisfy Shield Islands Dromon's choice, even when you don't have 2 power on your House?
Shield Islands Dromon says:
"After an opponent plays a location, put Shield Islands Dromon on the bottom of your deck to have that player choose to either place that location on the bottom of his or her deck or discard 2 power from his or her House."
The White Book says:
"Each time you lose a challenge as the attacker, kneel a standing Kingsguard character you control or discard 1 power from your House."
Here is ktom's ruling on The White Book:
"You must do one or the other successfully.
That means that if both options are open to you (i.e., you have a standing Kingsguard character and power on your House), you may choose which penalty is applied.
If only one option is open to you (i.e., all your Kingsguard characters are kneeling but you have power on your House or you have standing Kingsguard character but no power on your House), you must take the option that is left to you. You can't say "I choose to kneel the kneeling Kingsguard character" - which would result in an unsuccessful resolution - because you have another option in resolving the effect (discarding the power) that will be successful.
If neither option is open to you (i.e., all your Kingsguard characters are kneeling and you have no power on your House), the effect will fizzle completely."
Theon Greyjoy (PotS), because Kennon used it as the basis for his Shield Islands Dromon ruling, says:
After any player loses a challenge by 4 or more total STR, he or she names either "character" or "location," then chooses and discards from play (cannot be saved) 1 card of the named type he or she controls, if able."
Just looking at the three cards, Theon looks out of place. So, even if Shield Islands Dromon does allow you to choose an option that you can't successfully complete, I don't think Theon was a good example. The only thing you have to do to successfully complete Theon's choice is name either "character" or "location;" the rest just kind of follows.