Here we see the moment Spicy Stir gained her cutiemark.
She studied magic, runes, math, and applied it in a brilliant study about the way to go to the World of Living and back. She developed magical tattoo that could at will create her a body in the World of Living, and discard that body when she wants to visit her mom, The Mistress of the Other Side. But Spicy is just a pegasus, she don't have enough power to apply this tattoo. So she asked her mom for help. The all-powerful alicorn, of course, helped her daughter. And while applying the tattoo, Spicy's inner talent manifested, and integrated into the tattoo. The talent for magical math and runes, the talent for traveling through life and death.

Art by  shanikafaceless