From the official website:
"Soijl was created in the autumn of 2014 by Mattias Svensson and Henrik Kindvall.

Mattias had been writing Doom since the first time he picked up a guitar, but there had never been anyone else around him interested in playing that kind of music. So, except for a couple of years in Saturnus, Mattias hadn't been able to work with the music he enjoys the most.
This is why he, in the autumn of 2014, asked his good friend Henrik if he wanted to record some vocals on a couple of Doom tracks he had made. That's when Soijl was truly born.
Sure, Mattias has used the name Soijl during many years but never had the time to finish anything proper since there had always been something else in the way. But now, things have changed.