Two Naval-based questions, one for Cowed and one for the Emissary.
With Cowed, does "be declared alone" mean it is the only character being declared at that moment in time, or that upon being declared it is the only attacker/defender (delete as applicable) in the challenge? My assumption would be the former, in which case this attachment would shut down the Naval Enhancement quite nicely, but I thought it was worth checking.
Rhoynar Emissary, on the other hand, I don't have a clue with. If you target a Naval character, would that character have to immediately be Naval'd in, as its controller's first player action? Would it have to be declared as a defender during declaration of defenders framework action? Does it not matter which, so long as it is in the challenge by the end of that framework window? Or does it not matter so long as it enters the challenge at some point? If the latter, when would it be discarded? Right before challenge resolution? Or would it be moribund through the resolution?
Thanks for any help that can be given!
The releveant text from Emissary:
"If that character is not declared as a participant in the next challenge this phase for which it is eligble, discard it from play."
So this is an oddball one. What this does is create a lasting, passive effect. This passive effect can not officially resolve until the Framework Action for determining the winner of the challenge resolves. This is because a player action could resolve (like Naval) that declares a character as a participant in the challenge at any time up until step 3 of that Framework Action window. So in step 4 of the challenge resolution framework, if a character targetted by Rhoynar Emissary had not been declared as a participant in the challenge, it will be discarded. It will go Moribund immediately after the resolution of the passive effect the Emissary generated, in whatever order the First Player chooses the passives to be resolved.
Not simple, but I hope that makes it clear. This all assumes the text printed on the card is intended to function exactly as printed. I would recommend sending this in as an official question as it may not have been the designer's intent.