Morr and seven other Asha'man hold gateways as Rand's army pours through, preparing for the final battle with the Seanchan. Morr goes with the Companions to the south. (TPoD,Ch24)
Morr is with Rand and Min in the throne room. After they leave and the rooms explode, Rand sends them to the cellars telling Morr to guard Min with his life. By the time Rand returns Morr has succumbed to the taint and has the mind of a child. Rand poisons him. (TPoD,Ch29)
Other References
ACoS,Ch7 - Fedwin has a block that inhibits his ability to channel. He does not really believe that he can affect things at a distance, so his weaves peter out at fifty paces.
Books 