Season 1[]
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Bloom transforming for the first time in The Castle.
Much like in the animated series, Bloom possesses fire magic much more powerful than that of average fire magic. She properly unleashes this potential for the first time during the Winx's confrontation with the Trix in the very first issue.
Thanks to Flora's diversion, Bloom had enough time to gather her power together and break out of Icy's ice, transforming into her fairy form in the process. Realizing how powerful Bloom's magic truly was, the Trix were forced to retreat without Stella's scepter.
Bloom began to cultivate her powers while attending Alfea, during which she reveals to her newest friends that she discovered her powers at a much earlier point; that point being when she stepped into help Stella who was struggling to keep Knut and his band of Ghouls at bay.
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Bloom as the last fairy standing against a magic-absorbing monster in The Revelation.
It is not until Issue 10 where the mysterious source of Bloom's powers finally comes into light.
It turns out that the monster the Trix summoned by mispronouncing the incantation necessary to summon it is capable of absorbing all magic weaker than it that is hurled its way. It proves to be a formidable monster is at absorbs the magic of everyone that attacks it, even the magic of all Cloud Tower and Alfea's professors! When the Winx attempt to take down the monster, all their power is forcibly absorbed like everyone else's except for Bloom's. In fact, she is the only one capable of damaging the monster! The Trix, who were following the monster, take notice of this, causing Icy to realize that Bloom may be the one in possession of the power they have been seeking, the Dragon's Flame.
When Bloom decides to return to Earth after the monster's defeat, the Trix make their move and leave Cloud Tower to pursue Bloom now that they know where the Dragon's Flame is.
Come Issue 11, aptly titled Dragon's Flame, and it turns out that the Trix did indeed follow Bloom to Earth, where they ambushed her in her home. Using their Vacuums, the trio of witches had stripped Bloom of the Dragon's Flame as they told Bloom of her origins and their duty as the direct ancestors to the Ancestresses, the witches responsible for the downfall of Domino, Bloom's true homeworld.
After being brought back to Alfea and taking a quick visit to the now frozen wasteland that is Domino, the Winx learn from the Specialists that the Trix used the Dragon's Flame to erect the Army of Darkness, took over Cloud Tower, destroyed Red Fountain and cleared out Magix City, leaving Alfea as the only lasting establishment that can oppose them. Desperately wanting to regain her lost powers, Bloom plans a siege on Cloud Tower to take them back and with help from Knut, Stella, Sky and Brandon, she is able to sneak into Cloud Tower, where she and the rest of the group find the Dragon's Flame placed in the center of a large room in the following issue.
The Dragon's Flame in Magic Battle.
Unfortunately, this turns out to be a trap as Icy freeze the flame before Bloom can touch it and the group is quickly ambushed by the Trix. Luckily, Griffin and the rest of Cloud Tower's Witches arrive before the Trix erase Bloom and friends with their sparks of the Dragon's Flame.
With the Trix currently trapped behind a crystal wall, everyone else flees to the roof of the school to escape. As they all try to flee, the Trix easily break through Griffin's barrier and use their Dragon's Flame to send a portion of the Army of Darkness after everyone.