There is more than one artist/band called Agonal.

1) One man Doom/death metal project from Jon Francis located in Jackson, Kentucky, who released three full length albums to date:

Nikao in 2010
Threneo in 2011
A Suffering Complete in 2013

2) Grindcore/Metalcore band from Saskatchewan, Canada, which released their debut Dead Down Wind in 2011.
See here for more info about the Canadian band. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.