**The upcoming August 28 release of the Mega Evolution—Ascended Heroes Tin, which bundles four booster packs from the recent expansion, is the dominant catalyst pushing trader consensus toward a price decline for Mega Gengar ex by August 31.** This chase Special Illustration Rare from Ascended Heroes has already shown signs of softening after its initial post-release surge, with TCGPlayer data noting a sharp $141 drop in late July as secondary-market sales slowed. Fresh supply from the widely available tins is expected to accelerate that correction, mirroring typical patterns for high-demand Pokémon cards once reprint pathways open. While Gengar’s enduring popularity and strong collector demand provide some floor, the short window to month-end and lack of offsetting positive catalysts—such as new competitive play relevance or major tournament spotlight—leave little room for an upward move in the near term.