The band then released the Blizzard Beasts album. Shortly after Demonaz was diagnosed with a shoulder injury. He still continued to work with the band but stopped playing guitar live. Abbath changed from bass to guitar, and the band continued with different bass players over the years, releasing the albums At The Heart Of Winter, Damned In Black and Sons Of Northern Darkness.
In 2003 the band was put on ice, but returned to the stage in 2007 and did several headline appearances and tours of Australia, New Zealand and USA. All Shall Fall was released in 2009, followed by further massive festivalshows and additional concerts worldwide. In 2015, IMMORTAL and ex-singer/guitarist Abbath went separate ways.
The album Northern Chaos Gods was released on 6 July 2018. It is the ninth studio album By Immortal. This is the first album after the departure of Abbath from the band and their first studio album in almost nine years since All Shall Fall (2009).