The Way of Kings · Chapter 81
Shallan Discovers Her Soulcasting Ability
After stealing Jasnah's Soulcaster, Shallan realizes she can Soulcast without the fabrial, transforming a goblet into blood and revealing her Radiant potential.
Outcome
Shallan confesses her theft to Jasnah, who agrees to teach her properly, beginning her path as a Lightweaver.