In the game of Yu-Gi-Oh!, Slime monsters have been vastly underrepresented, and deserve an archetype of their own. Slimes are a classic monster in the gaming world, and even though Yu-Gi-Oh! is a card game at its core and not a video game, they're still a mostly untapped concept that Konami hasn't utilized to its full potential. Although there are a few Slime cards in the TCG, there isn't enough to make a Deck solely out of them.
Some of the first Slime monsters were used by Marik Ishtar in the classic Yu-Gi-Oh! Duel Monsters anime. Revival Jam and Humanoid Slime, along with the powerful Egyptian God Slime — which only recently came to the TCG and its simulator game, Yu-Gi-Oh! Master Duel — appeared in some of the most memorable duels in the show's history. While they're not the Yu-Gi-Oh! series' most iconic cards, they were still a crucial part of some of Marik's strategies. More Slime monsters have been released since, but not many have had the chance to stand on their own.
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The vast majority of Slime monsters have been support for other archetypes, notably D/D and the Egyptian Gods, and aren't viable by themselves. There are a lot of unique archetypes in Yu-Gi-Oh!, especially when counting the ones that only appear in the anime and manga, so it seems strange that a Slime-based archetype isn't counted among them. Hopefully, Konami will create one in the future, or at least release a few Slime cards in some of the upcoming packs and sets releasing in 2022.
Slimes might be some of the more obscure monsters in Yu-Gi-Oh!, but they don't have to be. There's a lot of potential in their designs, since as a blob of goo, a Slime can be anything. An archetype
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