"Door to Nothingness (Schematic) (Serial Numbered)" is a Rare card from the Magic: The Gathering set, The Brothers' War: Retro Frame Artifacts, designated as card #77. With a current market value of $400.00, it draws attention from collectors due to its unique serial numbering and thematic significance within the game. As a sought-after artifact, it reflects both gameplay utility and collector interest, positioning it as a notable piece in the trading card market.