Arachnotaur

 is a Spider god of anger from the Spider Planet in Galaxy Omega 9. He is the secondary antagonist of The Grim Adventures of Billy and Mandy: The Wrath of the Spider Queen.

Past Life
He was imprisoned by the Galactic Council in one of the Endsville Elementary School's chocolate milk cartons until he was accidentally released from his cosmic prison by Billy.

Present Life
During Velma Green's wedding day and invasion of the world, Billy was at the school café and went to pick which milk he was going to drink. He eventually choose chocolate milk which contained Arachnotaur in it, but it was snatched away by Jeff the Spider. Arachnotaur pretended to beg Billy to come rescue him, hoping it will be the perfect opportunity to be released from the carton. When Billy accidently smacked the carton off of Jeff's hands, the seal ripped open and inadvertently released Arachnotaur from its prison. Arachnotaur then possessed Jeff's mind and pitted them against each other.

Billy later arrived to help Jeff, and revealed to the spider that he was being mind-controlled. Arachnotaur then exited Jeff's body and showed himself, revealing that he wanted to teach Jeff the power of anger. But Billy stood up to the evil god and replies that there is no power in anger. He tells Arachnotaur that he would defeat the Spider God with the power of "passive resistance" until he eventually gets tired and goes away. However, Aracnotaur bets that he won't and proceeded to beat up Billy until he eventually did get bored and left using his web.

Personality
Being a God of Anger, Arachnotaur inspires those around him to release their anger and frustration. He is deceitful and violent as he encouraged Billy to hurt Jeff's feelings when the milk carton was destroyed despite Jeff being innocent, even letting out a grin at the thought of hurting Jeff. He even laughed when the argument ended with both participants angry. He possessed Jeff to teach the spider the power of anger and offered Billy an alliance for evil purposes before being interrupted.

Physical Appearance
Arachnotaur's is a cow and spider hybrid. His upper half is a brown muscular cow torso with chest hair while his lower half is that of a crimson spider with an udder. He wears a bell around his neck like most cows.

Abilities and Skills

 * Superhuman Strength - Arachnotaur's muscular physique granted him a high amount of strength as he was able to injure Billy, who is known to be able to take great amounts of pain. However, since Billy's endurance fluctuates between episodes, the exact level of Arachnotaur's strength is unknown.
 * Web - Due to being part spider, Arachnotaur is capable of extruding his web from his spider-like body.
 * Possession - Arachnotaur has shown the ability to possess other people's minds like what he did to Jeff.