During the War of Power Aginor creates the Shadowspawn. He tests over a hundred Myrddraal to destruction but cannot learn how they travel in shadows. (LoC,Ch6)
Aginor and Balthamel are trapped near the surface of the Bore. Time touches them and they grow immensely old, but they are the first to escape in the current Age. (TEotW,Ch50)
Aginor follows Rand and begins using the Eye of the World. He brags that he faced Lews Therin in the Hall of the Servants. When Rand starts using it also, Aginor draws too much and burns himself up. (TEotW,Ch51)
All that is left of Aginor is some oily ashes and burned cloth. (TEotW,Ch52)
LoC,Ch23 - Graendal thinks only a mad man like Aginor would have made the gholam. He also made the cafar and jumara. She had an almost fatal experience with one of his creations.