I believe the answer is garudan, since he is the only game changer,
which might be meant with
“when things go south
hope I’ve been here”
as he can literally win you a game, which went really bad for you.
Also the first phrase is quite fitting
“I Am your Mouth,
Not eyes or ears,”
since garudan does spit flames, which come from his mouth.
Is it Prophet of Tides ? A prophet is the mouth (the messenger) of a god, and the ability to moove lands is very useful against rush (when things go south). Well, it’s probably not that, because Prophet of Tides can only moove our own lands… Please tell me if I’m searching in the right direction
Otherwise, I understand “when things go south” as : when we are in great danger, when opponents’ creatures are coming near our orb.
Very funny game anyway ^^ Thank you !
For what It’s worth, I tried this on another forum, for a card game, funnily enough, and it turns out, and didn’t expect this, but it seems you get better at riddles with practice, both solving and making them.