In 2017, Iommi wrote and played on a choral piece for Birmingham Cathedral, " How Good It Is." More recently, the Black Sabbath icon played the guitar solo on a Candlemass song, rediscovered 500 of his own riffs and had a 469 million-year-old fossil named after him. Iommi arrived at the final product by cataloging "all the different smells that I like, and then he built perfume from that." It opens up to scents of cinnamon, rose and patchouli, while hints of sandalwood, ambergris, vanilla, Tonka bean, caramel and musk are also present. The fragrance contains top notes of bergamot, rum, geranium and passion fruit, according to the website. "I wrote the whole track and played on it and played the solo on it," Iommi says. In the same interview, the heavy metal pioneer shared that he has another collaboration coming up - a song on fellow former Sabbath bandmate Ozzy Osbourne's upcoming album. I really liked the idea of using some violins and cellos and stuff, and so we did on this track." Then I added these other gloomier riffs to make it blend in with this perfume idea. Iommi continues, "I've had the main part for a while, and I just added some new parts to it. He also plays with Spylacopa, and runs the independent record label, Rising Pulse Records. So I had this idea and I played it to him, and he liked it, and then I just added more parts to it." John plays guitar for legendary harcore/metal band, Candiria. He said, 'What about doing a tune for the scent?' And we thought it best to do an instrumental as opposed having a vocalist and going through all that. Iommi tells Rolling Stone, "Sergio also loves music, and he plays guitar. Hear "Scent of Dark" toward the bottom of this post.