"De Mysteriis Dom. Sathanas" 25th anniversary box set, limited edition (one time print). According to The True Mayhem Collection Facebook page - who leads the project - 3300 copies were pressed/distributed. — Each box set includes - The "De Mysteriis Dom. Sathanas" LP album, remastered from the original DAT, gatefold cover with gold foil lettering on the front and a 12x12 inch 10 page booklet, cat. number. AM006LP; - The "Rehearsal Skippergata, February 10th 1992" LP, side B etched, cat. number. AM006BOX-1; - The "Studio Rehearsal Møllergata, May 16th 1992" LP, cat. number. AM006BOX-2; - The "Instrumental Rough Mix Grieghallen, June 22nd-29th 1992" LP, cat. number. AM006BOX-3; - The "Vocal Session Grieghallen, April 30th-May 2nd 1993" LP, cat. number. AM006BOX-4; - A 96 pages hard cover book — Information "De Mysteriis Dom. Sathanas" was recorded at "The Grieg Memorial Hall" 92/93. "Rehearsal Skippergata, February 10th 1992" sound source from Euronymous' personal tape, courtesy of The True Mayhem Collection. "Studio Rehearsal Møllergata, May 16th 1992" sound source from a tape made by Euronymous for Morgan of Marduk, courtesy of The True Mayhem Collection. "Instrumental Rough Mix Grieghallen, June 22nd-29th 1992" sound source from a tape trade, courtesy of The True Mayhem Collection. "Vocal Session Grieghallen, April 30th- May 2nd 1993" sound source from Attila's personal tape, courtesy of The True Mayhem Collection. On May 10, 2021, it was revealed on instagram by thetruemayhemcollection that the Skippergata rehearsal is identical to the Møllergata rehearsal, except with worse sound.