i havent played in a while but i think you have to get 2 emblems and then go to the paintings room in the temple in the bull village, i think in the middle of the part 5 of the war

For the Selye fight scene you beed to go full out Nauxus route and Lizard tribe and to active the full on thing you need to visit the Bull tribe first when you want to pick sides for joining the war and after the Bull go to the Lizard and talk to Nauxus and accept immediately and that makes your choice to choose one Tribe chief to join in the war on and for you to know you had your full lizard tribe route.... You will need to be invited to the Lizard Tribe's festival just like the bull has and after the war collect every emblem and as time passes visit the waterfall on days 90-99 or 80-89 to fight selye and prepare some MP potions rather than HP cause high MP makes you heal twice than a HP potion..

Hey. I played through the main game with the War quests and accidentally chose to be on Nauxus's side instead of being neutral. I just got the game the other day and couldn't put it down. Anyways, the real question is, did I mess up on something for me to be neutral between both tribes? I accepted Thanes plans and he yet still got killed at the end of the war. Did I do something wrong between Thanes Plans and the festivals' in the Lizard Tribe and the Bull Tribe? Please Help. 

<< If you want to keep neutral route follow this

First, you must have 2 emblems before  start the war at Tavern  and Thane must stay at your tavern

Second, after you talk to Nauxus/Axel (up to your route) go back to tavern take  "clue" from  Thane.

Third, go to the temple , keep jump into the painting until Eyvind notice where is Thane got attacked

Fourth, go to there and prepare for battle

Also one more thing, How do I trigger the Selye fight scene? I'm wanting to get that done. 
<< After end every event of War event and let the days pass and sleep in Tavern

If you wake up and automatic go to river, you are the right way

And then, go to demon forest (first boss) and prepare to fight.

PS. If you are hypno fetish, you  should pretend  to lose.