Along with legendary down-tuned desert rockers Kyuss, New Jersey space-metal outfit Monster Magnet helped codify the stoner-rock template with the monolithic, acid-damaged riffs heard on the band's 1992 debut Spine of God and the even more lysergic follow-up EP Tab. Led by visionary singer/guitarist Dave Wyndorf, the band continued to refine its Hawkwind-meets-Cactus attack for major-label albums Superjudge and Dopes to Infinity, eventually dialing down the psychedelic element on the 1998 commercial breakthrough Powertrip. Monster Magnet struggled for much of the '00s as Wyndorf battled prescription-drug addiction and a string of lackluster efforts, but returned with a vengeance on its comeback album, Mastermind, three years ago. Wyndorf and the band continue to mine a more psychedelic vein of hard rock on its latest Napalm Records salvo, The Last Patrol. Monster Magnet delivers its trademark swirling heaviness this Tuesday at the Independent, along with Zeppelinesque support act Royal Thunder.