Vilgax, known by many as “The Conquerer”, “The Coming Storm”, and “The Decimator”, is an intergalactic warlord who is widely regarded as the most dangerous being in the known Universe. He believes that the Universe is unstructured and in constant chaos that must be corrected, so he took it upon himself to conquer every planet under his empire and guide them into a new Universal order where he sees perfection. 

For over a Century he’s being spreading his Empire throughout the Galaxy, but is constantly thwarted by the Plumbers, an intergalactic police force who seek to protect those from Vilgax’s reign. It wasn’t until a plumber by the name of Max Tennyson, defeated Vilgax to the point of withdrawing his reign and residing to his section of space only, never to domain the Universe.

But one day, he heard rumours of a device called the “Omnitrix”. After further study, he discovered it had the ability to transform it’s user into an arsenal of alien creatures, and figured if he could obtain and replicate the device, he’d have an army of powerful alien shapeshifters at his command, and thus finally claim his victory.

He’s over 500 years old, with almost half of that being the ruler of his planet Murray.

He has many cybernetic enhancements and weapons surrounding his body. Such as steroid boosters in his arms for additional strength. Optic laser-blast implants in his eyes along with a built in scanner. Merging his body with his power suit for strength, speed, and durability. The mystical Ruby-Ray of Rouleau attacked to his right hand for basic spell casting.

The left arm is a mixture of special Galvanic Mechamorph technology and a custom built Khoros prosthetic which grants him technopathic abilities and a myriad of weapons. This was the result of Max Tennyson slicing his left arm off in a past battle. But Vilgax returned the favour eventually.

So far his reign consists of conquering 36 Planets (including a Solar System), destroying 8 others, completing the Map of Infinity to seek the Forge of Creation (he is now banished) and creating a Black Hole. He is wanted in 4 systems, but the Plumbers have difficulty arresting him due to his Diplomatic Immunity as the leader of several planets.

For about 20 years now, he has dedicated his life into studying and obtaining the Omnitrix. He knows more about the device than any person, except Azmuth.

Ben eventually meets Vilgax three months after finding the Omnitrix. Vilgax almost succeeds in getting the watch if it weren’t for Max and Gwen backing Ben up.

He tries to defeat Ben multiple times, and every time he does, Ben becomes more and more afraid of him. To the point where he starts having nightmares about him, affecting his hero work. He considers Vilgax his worst enemy, as his only goals are to take the Omnitrix and kill him.

After a couple years of fighting, Ben finally defeats Vilgax by using Way Big to throw him into deep space and leading an uprising on his conquered planets. Fearful of Ben obtaining a To’Kustar transformation, he decides to surrender himself and self-banish himself in the Null Void. Secretly plotting revenge against Tennyson.

Vilgax is ruthless, cruel, and power-hungry. Vilgax operates with the single-minded objective of acquiring the Omnitrix, which is the key to ultimate power, and rule the entire Universe with an iron fist. He believes that every galaxy is chaotic and the planets bring their own destruction when roaming free, especially with the diplomacy of the plumbers. So he aims to conquer every corner of the Universe in order to maintain peace and order under his rule.