— Deckard Cain(src)
Ku Y'leh was a famous sage.
"Ormus remembers the tale of Ku Y'leh. That venerable sage forgot that there is no life beyond death. There is only life. Once prolonged unnaturally, it can become a living hell."— Ormus(src)
Y'leh was known for his studies about life beyond death. When he died, his ashes were preserved in a golden statuette shaped in the form of a bird. Upon reflecting on Ku Y'leh's tale, Ormus commented that "there is no life beyond death. There is only life." He implied that Ku Y'leh had tried to prolong his own life, but suffered the consequences for it.
Ku Y'leh's statue was found many years later in the collection of Meshif, who did not know the contents of the statuette. He traded it to an adventurer when the adventurer brought him a Jade Figurine that helped him complete his Jade collection. The adventurer, on knowing the statue's contents from Deckard Cain, then proceeded to use the ashes to increase their own life, with the help of Alkor the Alchemist.