The Way of Kings · Chapter 81
Shallan Discovers Her Soulcasting Ability
After being poisoned by Kabsal's bread and jam, Shallan realizes she can Soulcast without a fabrial, transforming a goblet into blood and accessing Shadesmar.
Outcome
Shallan learns she has innate Radiant abilities and begins her true apprenticeship under Jasnah, studying the Voidbringers.