This is NOT the Japanese Ruler of the Black Flame
Ruler of the Black Flame is the name of the third main expansion of cards from the Scarlet & Violet Series of the Pokémon Trading Card Game. Ruler of the Black Flame are the first sets to feature Tera Pokémon ex with types that differ from their usual types. Type-shifted Tera Pokémon ex use the same Energy types as their usual type for their attacks, but have differing Weakness and Resistance in accordance with their shifted type.   (Source:bulbapedia)
 
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