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Ice Nine Kills is an American heavy metal band from Boston, Massachusetts. The band was originally formed in 2000 by high school friends Spencer Charnas and Jeremy Schwartz as a ska punk group called Ice Nine. In 2010, the band shifted to a metalcore style, with Charnas remaining as the only founding member. The band is signed to Fearless Records. Ice Nine Kills has released three EPs and six full-length studio albums, including Last Chance to Make Amends, Safe Is Just a Shadow, The Predator Becomes the Prey, Every Trick in the Book, The Silver Scream, and The Silver Scream 2: Welcome to Horrorwood. The album Every Trick in the Book peaked at number 122 on the US Billboard 200; The Silver Scream reached number 29; and The Silver Scream 2: Welcome to Horrorwood peaked at number 18. The band's name is derived from the fictional substance ice-nine from Kurt Vonnegut's 1963 novel Cat's Cradle. In 2025, Jeff Mezydlo included the band in a list of "the greatest metal acts that formed in the 2000s." In 2023, Spencer Charnas was listed among the "10 Best Clean Singers in Metalcore" by Jake Richardson of Loudwire.