Former Megadeth Guitarist Blasts Mustaine

Young appeared on the band's 1988 album So Far, So Good... So What! and admits he's spent 20 years fuming about Mustaine's self-important stance.

And after reading a recent interview with the rocker in Guitar World magazine, Young is finally speaking out.

He writes on his official MySpace blog: "Over the years, this tragic cat has made a hobby of dissing, exaggerating and just plain lying on some level about nearly every talented musician that has passed through his dysfunctional little ensemble. Literally, spitting in the face of the very folks that covered for his drugged out, sloppy-a**and helped make him successful."

Young follows with a letter to Mustaine, continuing, "Let's be clear for the record: You were not in the studio with me during any of my tracking... not one song - not one second. You know it and I know it. You need to stop blatantly lying to your fans and in the media. Perhaps, next time you look in the mirror... you'll pause to consider why you feel the need to continually perpetuate ridiculous bulls**t and belittle others in order to make yourself seem more significant or talented?

"You consider yourself a 'genius' yet after all these years, you're still not smart enough to comprehend that when you diminish others, you diminish yourself most of all. Consider the giant glass house you've built for yourself and put your silly little stones down, once and for all. At the very least for all the players that helped create all the success you now so arrogantly and selfishly enjoy."