Bonding

"The bonding is done with the One Power, and permanently links the Warder and the Aes Sedai. Ethically the Warder-also called Gaidin, Brother to Battle-must accede to the bonding voluntarily, but it has been known to be done against the Warder's will. The bond gives the Warder the gift of quick healing, the ability to go without food, water, or rest for long periods of time, and the ability to sense the taint of the Dark One at a distance. He can also sense certain things about his charge, including her death."