yugioh road warrior deck 5D's Starter [Toy] : Toys & Games YU-GI-OH! NOSTALGIC! 5DS Starter Deck

Cards are valued according to their TCGPlayer Market Price, representing what you might pay on average for any ( first edition, where applicable) copy of the cards below

Metal Energy Just like Darkness Energy, Metal Energy was originally a Special Energy type, but became a Basic Energy as far back as 2006

However a few do have "practical" uses - here are some examples: The particular card you reference, Garruk the Slayer, was created for the Magic 2015 prerelease and is used in a variant where one player plays normally and the other plays as Garruk

And we also know 3 of the 4 Megas thanks to Mega Mewtwo-X, Mega Mewtwo-Y, and Mega Houndoom being featured on the booster packs