yup i started it whilst doing the ninja quests with a friend. we were on utsusemi and we'd stopped for a break while he was afk and when he came back he saw a ??? and activated it and out comes a big Kraken looking thing and slaughters us both... i think its part of the mission...
i herd this guy gives you a quest where you go in to sea serpents grotto and have aot find some one i havent atmepted ityet but when i do ill put infor on the post