Talk:Mesa (Warframe)/@comment-105.237.120.34-20150408073602/@comment-46.193.175.27-20150408085956

did you take a look at the mutalisk alad 5's page?

http://warframe.wikia.com/wiki/Mutalist_Alad_V

"In order to gain mission access to Mutalist Alad V, players are required to create a Mutalist Alad V Assassinate Key as a battle pay reward from infested invasions, as well as a blueprint awarded from the Patient Zero quest. Upon using the key, the cell will be taken to an Infested Ship on Eriswhere they can face Mutalist Alad V.