* Fusion Summoning: Fusion Summoning requires specific Fusion Monsters and their corresponding Fusion Materials. There is no Fusion Monster that uses both Dark Magician and Buster Blade as materials.
* Different Types: Dark Magician is a Spellcaster-type monster, while Buster Blade is a Machine-type monster. Most Fusion Monsters require materials of the same type.
However, there are some cards that can be used in conjunction with both Dark Magician and Buster Blade in a deck:
* "Dark Magician of Chaos" This Fusion Monster can be summoned using Dark Magician and another Dark Magician monster. It can also be used to equip Buster Blade with an effect that increases its Attack.
* "Chaos Emperor Dragon - Envoy of the End" This powerful Fusion Monster can be summoned using Dark Magician, Buster Blade, and another monster.
Ultimately, you can't directly fuse Dark Magician and Buster Blade to create a new monster.