Oleandra's trip to Ollivanders starts with a familiar sense of dread. She has watched Daphne wave her wand, producing colorful sparks, but her own attempts at magic have been disappointing. In the wand shop, something peculiar happens: Oleandra's "Mystic Eyes" activate, revealing tendrils of light connecting every wand box, a vast, pulsating spider's web of magic visible only to her. This vision is a stark contrast to her previous inability to sense magic, confirming her unique connection to an unseen magical world. Despite this internal revelation, her external performance is dismal. She tries wand after wand, each responding with silence, angry sparks, or even a foul odor. Daphne's sarcastic remarks about her being magical only twist the knife. Ollivander, the master wandmaker, is utterly perplexed, unable to match her with a suitable wand from his inventory. He offers theories about wands choosing wizards, but internally struggles to understand her "perplexing" case. The eventual wand she receives is a generic "all-around decent" cherry wood, an anticlimactic end to a three-hour ordeal. This experience solidifies her aversion to wands, leaving her to ponder the nature of her unique vision and the path her magic will truly take.

Oleandra's first year at Hogwarts brings immediate challenges with traditional magic; her Lumos is slow, and Transfiguration eludes her. During an Astronomy class, her Mystic Eyes are overwhelmed by the night sky, eight stars glowing brightly before her. She hears a name, "Odala," and complex knowledge floods her mind, forcing her into a 36-hour coma. Dumbledore, upon examining her, detects a "soulless" state, misinterpreting the automatic defensive runes (Naudhiz, Elhaz, Mannaz) that protect her soul from the torrent of cosmic information. This misdirection marks her as a person of interest to the headmaster, yet he completely misunderstands the nature of her power. Later, during the Halloween feast, Oleandra encounters a Mountain Troll in the girls' bathroom with Hermione. In a moment of terror, she intuitively invokes the Elhaz protection rune, which shields her from the troll's club, sending her flying but largely unharmed. She then uses the Isaz rune to freeze the floor, creating a tactical advantage that allows Harry and Ron to defeat the monster. This act of raw, instinctive rune magic, combined with Hermione's quick thinking, earns Slytherin a surprising fifty points from Snape, cementing her ingenuity and the tangible power of her nascent star magic.

Fresh from her magical awakening, Oleandra quickly finds herself on the Slytherin Quidditch team, where she uses the Raidhu rune carved on her palm to control her broom and cheat at flying, astounding Madam Hooch. She begins to formalize the rules of her star magic, understanding its reliance on physical manifestation and the starlit sky, but also its weakness underground. Her journey to retrieve the Philosopher's Stone, initially for Astoria's blood curse, sees her and Daphne use Berkana and Fehu to grow immense oak trees, impaling and killing Fluffy, the three-headed dog. This brutal efficiency showcases the destructive potential of her runes. The pursuit leads to the Ministry's Death Chamber, where Mafalda (possessed by Tom Riddle) confronts them. In a desperate act, Oleandra combines several runes (Ansuz, Laukaz, Uruz, Elhaz, Raidhu, Eihwaz, Dagaz) and uses the Philosopher's Stone as a power source to perform "Realm Travel," escaping the Chamber. This extraordinary feat transports her to Niflheim, the land of the dead, where she learns about Dementors' true cosmic role. She returns to the Ministry, evading capture by using Perthro and Mannaz to disguise herself, leaving the Unspeakables baffled by her "Shade" appearance. Her escape destroys the Stone, a pivotal moment that reshapes the canon plot.

The second year at Hogwarts escalates dramatically, with Tom Riddle's diary manipulating events, culminating in Mafalda Prewett's possession. Oleandra discovers her own magical limitations are due to an ancient "yin-yang seal" curse on her soul, a revelation that reframes her entire magical journey and provides a new personal stake in her power. Daphne, seeking to enhance her own abilities and cure Astoria, brews the Bloodline Atavism Potion. She drinks it herself, transforming her hair into lush green vines and granting her Wood Nymph traits, along with accelerated aging. The climax unfolds in the Chamber of Secrets, where Mafalda (now fully controlled by Riddle) unleashes the Basilisk. The battle is a brutal display of combined magic: Daphne's new plant-control powers (Berkana, Fehu) manifest a forest of oak trees, restraining the Basilisk, while Oleandra, despite her exhaustion, channels the rune of war, Teiwaz, to wound Mafalda. Harry, guided by Fawkes, uses the Sword of Gryffindor to kill the Basilisk. Mafalda faints, and the diary is destroyed, but not before Oleandra and Daphne suffer severe physical and magical repercussions, their bodies pushed beyond their limits.