Acheron

As the creator of the Legendarium, he can create powerful characters to attack enemies. Even when he was trapped in the Legendarium, he could transport Selene to the Library of Alexandria. When freed, he created lightning bolts and bolts of dark energy. While creating the Legendarium, he was stronger than his opponents (except for Dragonfire). Like all sorcerers, he can fly. He can also create red balls of energy and hurl them at enemies.
Some of Acheron's abilities:
Create powerful characters to attack enemies. As the creator of the Legendarium, he can summon legendary creatures.

Teleportation. Even while locked in the Legendarium, Acheron could transport people, for example, to the Lost Library of Alexandria.

The creation of lightning bolts and clots of dark energy. After being released from the Legendarium, he was able to generate these magical elements.
Releasing red beams of energy from the hands.

Flight (like all wizards).

Basic first-level spells that all wizards can use: telekinesis, object transformation, and minor troubleshooting.

The "Infinite Chaos" spell allows one to strip the inhabitants of the Magical Dimension of their magic.

Harnessing the power of reptiles. Acheron granted Selina the power of snakes, and at the end of Season 6, he summoned the Spirit of Reptile.

Dragon Fire

He wanted to become the greatest mage, but after creating the Legendarium, he was unable to control it and was trapped on a single blank page of a book. Later, when the Legendarium was found, Acheron attempted to subjugate it, which he eventually succeeded in doing. The girl—now a snake witch—ran away from her mentor Eldora's house, stealing the Legendarium, and set out to free Acheron.

While Eldora was on a journey around the world, looking for a way to close the Legendarium, Acheron spied on her and learned of a secret room in the Library of Alexandria, where she hid her diary at the end of her journey.

Acheron is a pale-skinned sorcerer with a hooked nose, bright yellow pupil-less eyes, and a carefully trimmed dark beard. His attire resembles armor: a red tunic with a hood and wide sleeves, baggy trousers tucked into boots, and a large yellow gemstone on his chest.

Acheron is a dark mage and the main antagonist of the sixth season of the Winx Club animated series. He always provokes and turns everything into battles, fighting anyone who writes to him. He always challenges people to a duel.