I picked this up on the final Nasum tour when it stopped in Los Angeles in 2012. This was the tour Keijo from Rotten Sound filled in on vocals for the deceased Mieszko. Anders wanted to lay the band to rest the right way and holy shit did they!
The shirt artwork itself is from the awesome Grind Finale compilation that contained every Nasum track that you may or may not have had from various splits, EPs, etc.
Hands down one of my favorite shirts and one that I haven't seen again since that show 4 years ago.