Hex (Classic)

Hex is a "Master Magician." In "Lucky Girl", he possesses five "magical" charms called the Charms of Bezel that give him the powers of levitation, fire, reincarnation, lightning, and luck, in addition to his own spellcasting abilities. He attempts to steal an ancient spellbook known as the Archamada Book of Spells during the episode. It dates back to the 16th century and contains powerful spells that, when wielded by someone holding the Charms of Bezel (which are actually Bezellian technology that appears to be magic to human eyes), give the wielder unimaginable powers. He is eventually defeated by Gwen, Ben, and Max. Gwen also smashes the charms. Technically speaking, he is Gwen's "Vilgax".

Hex returns in "Tough Luck", where he's searching for the Keystone of Bezel. With it, he can recreate the other five Charms and multiply his power ten times. He is accompanied by his niece, Charmcaster, who is his apprentice that freed him from prison. However, he fails due to both Ben's interference and Charmcaster betraying him so she can take the Charms for herself (though she fails as well).

Hex returns in "Don't Drink the Water", having aged into an old man since his last appearance. Learning of the Fountain of Youth, he tracks it down and uses it to live forever. However, Ben uses Heatblast to evaporate the Fountain, which overexposes Hex and reduces him to an infant. Hex is last seen in Charmcaster's hands, where his niece enjoys taunting him at his expense.

Hex (who is revealed to have been possessed by Ghostfreak once defeated) appears in Ben 10: Protector of Earth, but only as a mini-boss that Ben faces at the end of Effigy Mounds.