Monster Hunter World: Iceborne Blackveil Vaal Hazak Hunt

The Research Guild has noticed that the Rotten Vale is unusually quiet. Sending out their scout team the reports come back that the miasma in the lower vale is extremely thick. As they explore further, they spot a Vaal Hazak roaming in the distance. They send a request for an A-List Hunter to subdue the Elder Dragon. However, before the request can reach the guild, another request follows with updated information. The information was wrong as a variant of Vaal Hazak, the Blackveil Vaal hazak, has made the lower vale it's new nesting ground. The research Guild requests that four A-List Hunters subdue the Elder Dragon so they can study the reason why it made the Rotten Vale it's new home.