The Crystal of Fate (short story)
Lord Phostrin of the Sky Shoals, a Tzeentchian warlord, has grown tired of being manipulated by sorcerers. Now he seeks to climb out from under their sway with a magical gem possessed by Kairos Fateweaver that has the power to grant great power and immortality to its bearer. He has only to find it and claim it to achieve his destiny.
This story was printed as a part of the series Call of Chaos