Ygorl attempted to shred the walls between the planes, creating world ending chaos. Although he was resisted by a group of adventurers who where able to defeat Ygorl and destroy him, he was successful in his plan for "Chaos Absolute", using the Anima Canon to merge all planes into one massive plane of existence. While this did create mass plane wide chaos, and millions of people and many deities died, after 50 years, the survivors began to form a new world, making Ygorl's efforts ultimately in vain.
Ygorl is the slaad lord of entropy, the second-oldest slaad lord after Ssendam, and was considered the "de facto" ruler of Limbo. The best known and most dreaded of the slaad lords, Ygorl's life is not lived in chronological order. Being a living manifestation of chaos, he is forced to jump around the timeline randomly. He may live for several years in one time line, then suddenly jump 200 years into the past, then suddenly jump 900 years into the future, with no control over where his next destination is. This gives Ygorl a grim, but interesting view on the universe, having met someone before they met him, or even see someone die before they are born. Legend says that Ygorl was actually born at the end of the universe and will die at the beginning.
It was said that at one point, all Slaadi residing in Limbo, including Ygorl, had no physical body. They where simply manifestations of pure chaos, until the God of Law Primus inserted a mystical stone into Limbo that was focused on the Slaad race, forcing them to take frog-like forms rather than their original, purely chaotic shapes. The Slaad Lords and the most powerful Slaadi have learned to retain at least some measure of shapeshifting ability.
Ygorl's only drive was the delightful act of unmaking, bringing chaos to any plane he entered, and it was death, decay, and disorganization that he most desired to force the multiverse to accept.
"This was all to prove to you that chaos is the ultimate perfection. Chaos rules all, even your life. I wanted to prove that anyone is capable of anything, even killing a friend, in the face of chaos, uncertainly and death." - Ygorl