# Sidisi, Undead Vizier Sidisi represents a key moment in Magic's design philosophy around tutors and self-mill synergies. The card's delve mechanic paired with instant-speed tutoring created genuine deck-building tension: you're fueling your graveyard while searching for answers. Collectors appreciate it as a functional piece that saw competitive play across multiple formats, particularly in Standard and Modern during its era. The foil variant holds appeal for players who built around graveyard strategies, though neither version commands premium prices. Sidisi matters less as a chase card and more as a solid example of Dragons of Tarkir's mechanical depth—the kind of rare that rewards deckbuilding knowledge rather than raw power level.