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Here's a question:

Was there any indication or in game that random NPC was the person to talk to to start the quest?

I was trying a new experiment last night. I wanted to see if I could do all of ToAU without first looking at a guide, you know, figure it out for myself. So i filtered all shouts and says and headed out Mhaura cause I had heard something about it before. So I get to mhaura and start spamming every NPC to try and get some info, i got nothing much at all. So I noticed the throng of people on the loading platform so I when the boat comes and of course i get kicked off for not having a boarding pass.

Boarding pass? Who the hell mentioned anything about a boardingpass. I looked around for a bit, decided to get a little hint and turn off shout filters enough to know that there was an NPC to talk to in tenshodo that would start it off. Ok a little cheating so what. SO i runover there, i try to find the NPC the most number of PCs are swarmed around and click him, get a brief cutscene, do the 2 response with little to no luck.

I log off for the night frustrated. I ended up looking online and come to find out there was a secret invisible 3rd answer to choose (I guess i haven't tried).

Now does anyone else think that's a little ridiculous? I may not be the most thourgh person but holy cow, the first ToAU mission description could, you know, push you in the right general direction. But to give it to a seemingly random NPC and make the choice invisible, is a little much. I kinda wish there was a way to play this game that didn't require having a printed out guide outlining step-by-step how you had to do everything.

Well, maybe it's a glitch. Idk an Invisible answer seems kind of... Stupid to me. Unless they want you to go on some Side quest, or make you do the Sentinel Badge quests first. So Idk.