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And only one copy of any card is allowed except basic lands in a Commander deck

Legendary Creature - Demon Kraken Huntmaster Liger Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own

But many other artists will command a premium, and sometimes even a large premium, such as artists who are no longer with us (Chris Rush, Glen Angus, for example), or who no longer sign (Chippy, Mike Raabe)

That mana cost is considered to be printed on the card and is part of its copiable characteristics

Gray Merchant of Asphodel Gray Merchant of Asphodel, or Gary, is a creature that dominated its Standard format