The Pokémon Mega M Gengar EX XY166 Full Art Black Star Promo card is a special edition collectible card from the Pokémon TCG series. This card features Gengar, a Psychic-type creature with 210 HP, and is part of the XY set. Manufactured in 2016 by The Pokémon Company, this card is illustrated by 5ban Graphics and authenticated by Professional Sports Authenticator (PSA). As a promo card with a holographic finish, it holds rarity and value for collectors and players alike.