Ruler of the Black Flame  (Japanese: 黒こく炎えんの支し配はい者しゃ 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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