Arckanum was a Swedish black metal solo band formed in 1993 by Johan "Shamaatae" Lahger, who was the only constant member. Arckanum ranks among the most influential and popular in the Swedish black metal scene.

Shamaatae is also an author of occult literature and writes under the names Vexior/Ekortu. His first published work, titled Panparadox, was released 13 July 2009 by Ixaxaar. His second book, Gullveigarbók, was released in December 2010 by Fall of Man. His third book was published on December, 21st 2014 called Þursakyngi, it is said to be a "book series" with each book dedicated to the Thursatru tradition. As of 2018, he has published multiple books and has many more to come. He put the band to rest in favour of being a writer.