Nate Garrett is one of heavy metal’s great dreamers. The albums he’s made over the past decade with his flagship project, Spirit Adrift , would seem quixotic if they weren’t so utterly self-assured. These are works of deep conviction, carved in steel by a true believer in metal’s transcendental power. While most of Garrett’s peers have reluctantly embraced the fragmentation of the genre’s post-commercial era, Spirit Adrift have distinguished themselves by making stridently big-tent music that sounds like it’s battling Ozzy Osbourne and Metallica for chart position in 1991. Arena metal is effectively a meaningless term unless you’re on a short list of legacy bands ( Maiden , Priest ) and barely-metal novelties ( Sleep Token , Ghost ), but Garrett’s work on modern classics like 2017’s Curse of Conception and 2019’s Divided by Darkness made that kind of mainstream breakthrough seem theoretically in play.…