The first of the "Magna Warriors" was "Valkyrion", which required itself in hand and 3 specific Normal Monsters on hand/field
Arctovish SV037/122 - Shiny Vault Holofoil Arctovish SV037/122 - Shiny Vault Holofoil The Pokmon Company During your opponent's next turn, this Pokmon takes 60 less damage from attacks (after applying Weakness and Resistance)
Im still happy to play it in base red decks, but its not a top uncommon
Defense Position: Once per turn, during your Main Phase: You can roll a six-sided die, excavate that many cards from the top of your Deck (or as many as you can), and if you do, you can send 1 excavated "Morphtronic" card to the GY, also place the rest on either the top or bottom of the Deck in any order
Every one of these sets has caused at least one ban in Modern, Legacy, and Pauper - and usually several