This fusion was initially introduced in the anime series, and the fusion was based on the following:
* Blackland Fire Dragon (Fire Attribute/Dragon-Type/Level 7/ATK 2000/DEF 1500)
* Red-Eyes B. Dragon (Fire Attribute/Dragon-Type/Level 7/ATK 2400/DEF 2000)
These two monsters fuse together to form the powerful Red-Eyes Black (Fire Attribute/Dragon-Type/Level 8/ATK 2800/DEF 2400).
It's important to note that while the anime depicted this fusion, it wasn't originally part of the official card game. The fusion summoning method was introduced later, and Red-Eyes Black is now summoned with different materials in the game.