I have all my characters lvled to around 50 and have done all the quests in my quest log. In my mision log it says i need to capture a rare monster (avidoseras) in the western shores of yuma lake. But i havent even unlocked western shores in yuma lake (have forgotton caverns, lake of souls , lake passage and underground lake)

Can anybody help me?

Did you make the Crimson Seal?

thats it. Thanks for the quick response.