Jasnah and Stick
Jasnah opens her eyes to find herself in a room with nothing but a small stick. She stands up and attempts to soul cast the wall; it resists her (It's aluminum.) She picks up the stick and attempts to turn it into metal and chisel her way out.
"You're steel", she tells the stick.
The stick replies with, "I am a stick."
"You're steel."
"I am a-"
"You're steel," she repeats again.
"I-" the stick hesitates, and Jasnah waits for the stick to turn into metal.
"I am a stick," it says finally.
Jasnah stares wide-eyed at the stick. She attempts to make it turn again. failing that, she tries to persuade it, and finally ending with her getting frustrated and yelling at the stick. The stick does not bend.
Jasnah is in awe of the power of the stick. She keeps the stick, and tries to find another way out. Once she returns to her family, she speaks to her ward and Daliner in private.
"Uncle, I have made an amazing discovery."
"What is it?" he asks.
Jasnah brings out the stick. Shallan recognizes the stick and blushes furiously, still unaware of the power she had faced then.
"It is a stick. And we must make it a tree."