"Good work locating Scheer. He's one of the most brilliant Elders there are. If anyone can help us figure out the secret to CluDathoon's weapon, it's him. Speaking of which. I need to continue my own analysis. I detected Mutated Pigmen on a ridge above Scheer's lab. Head back there, and bring me 20 x Mutated Flesh so I can continue my research."
With your wings and rocket boots, return to Scheer's lab by following the first two purple and white rings, and then the orange rings. Locate the spawner surrounded by Mutated Pigmen. Kill as many as you need to in order to optain 20 of the Mutated Flesh that they drop. Once you have done so, return to /warp chapter3.