The Ghost Market is ethereal and intangible - it cannot be physically held but can be accessed through meditation or ritual in the Underdark's deepest spaces. It is self-updating, automatically recording all tag exchanges, challenges, and notable events in the league's history. The Market is communicative, speaking to bearers through whispers, sudden insights, or fleeting visions. Most importantly, it is selective - it only reveals information to those it deems worthy or interesting, creating a reputation-based access system where demonstrated strategic value earns deeper knowledge.

The Ghost Market serves as the Underdark's ultimate intelligence network, providing bearers with strategic knowledge that goes beyond physical prowess. By understanding an opponent's vulnerabilities before engaging in a tag exchange, a delver can manipulate outcomes in their favor. However, this power comes with a cost - using the Market's intelligence too aggressively marks the bearer as a dangerous information broker, making them a target for those who wish to control or eliminate such knowledge.