The longest-running rivalry in modern metal pits Mushroomhead against Slipknot, a conflict that continues its inexorable march toward some sort of Wrestle­mania resolution. The feud started back in 1999, when Mushroomhead accused Slipknot of stealing its creepy-mask shtick, and it's only become more heated in recent years. Mushroomhead ridiculed its nemesis during a Halloween 2006 performance, then posted a parody of Slipknot's album artwork on April Fool's Day 2007. Mushroomhead looks much scarier than its archenemy: Its members' masks resemble actual rotting flesh rather than rubber disguises. The group's gory video "12 Hundred" contains more disturbing... More >>>