Mutate turns two or more creature cards into one permanent, merging their abilities, and usually granting a special benefit when you do so - but the specific wording of the rules generates many edge cases you need to be aware of
These errors are well-documented, so check online first to see if your card is potentially part of this printing mistake
Commander 2013 There are a total of 16 cards from Commander 2013 with a value of $2 or more

Aboleth Spawn Abomination of Gudul Advanced Stitchwing Atraxa, Praetors' Voice Awoken Horror Captain N'ghathrod Chained Throatseeker Chasm Skulker Clammy Prowler Cleaver Skaab Consuming Aberration Cruel Witness Dinrova Horror Docent of Perfection Dreadlight Monstrosity Drownyard Amalgam Etherium Abomination Forgotten Creation Geralf's Masterpiece Geralf's Mindcrusher Grazilaxx, Illithid Scholar Grell Philosopher Havengul Skaab Hordewing Skaab Horrid Shadowspinner Hullbreaker Horror Illithid Harvester Ingenious Skaab Kederekt Creeper Kraum, Ludevic's Opus Kraum, Ludevic's Opus Kraum, Violent Cacophony Krothuss, Lord of the Deep Laboratory Brute Laboratory Drudge Lamplighter of Selhoff Ludevic's Abomination Makeshift Mauler Mind Flayer Mindleech Mass Mindwrack Liege Murkfiend Liege Nemesis of Reason Nihiloor Overcharged Amalgam Overlord of the Floodpits Patchwork Crawler Perfected Form Pink Horror Possessed Aven Psychic Symbiont Renegade Silent Rootcoil Creeper Sauron, Lord of the Rings Sauron, the Dark Lord Screaming Swarm Silent Hallcreeper Skaab Ruinator Sludge Monster Stitched Mangler Stitchwing Skaab Storm Skreelix Tekuthal, Inquiry Dominus The Flood of Mars The Master of Keys Thing in the Ice Thrummingbird Uchbenbak, the Great Mistake Umbris, Fear Manifest Wandering Mind Wharf Infiltrator Wretched Throng
