The weather in the entire Black Shroud changes when Odin is up. It's just a matter of finding him. (you'll probably see shouts in the zone he's in)
i really hope they will change it to an instanced 8 men fight with a cooldown timer. This spammy crap is flawed and it will not get any better. throw 500 ppl at one boss... great idea...
i really don't get why they made it that way. And... i fought him once... but lol i didnt see him. too many ppl. What an immersion!
To add those monsters into FATE system wasn't the best idea. Save those things for better content than FATE.