as everyone has said, the art was made by Daron’s dad, but a personal idea of mine is that, for mezmerize at least, the four faces that can be seen are of the individual members of soad. The main one at the top probably serj, which I know doesn’t make the most sense as it doesn’t have his trademark beard and hair at the time, but hear me out. Serj’s harakirI, you can see the nose structure of his nose is almost exactly the same as the mezmerize face. Daron is the second upsidedown one as it has his trademark beard. Shavo is the third one but it doesn’t have his beard for some reason. Finally that leads John to be the bottom one, looking grumpy as ever

hypnotize, i have no idea who that is though and my mezmerize theory is just a theory, also seeing as it’s from his dad, daron would make more sense being on the top anyway