Aetherflux Reservoir (Schematic) (Serial Numbered) is a Mythic rarity card from the Magic: The Gathering set The Brothers' War: Retro Frame Artifacts. Valued at $399.99, this card appeals to collectors due to its unique serial numbering and distinctive schematic artwork. As a pivotal card in various decks, its market presence reflects both its gameplay utility and collector interest, making it a notable piece in the current trading landscape.