The Pokémon M Gengar EX XY166 Mega Evolution Promo Holo card is a highly sought-after collectible featuring the Psychic-type creature M Gengar EX with 210 HP. This English card from 2016 showcases beautiful artwork by 5ban Graphics and has a special EX specialty within the XY set. With a cost of 3 Psychic and 1 Colorless, this card boasts a powerful attack power of 120 and is considered a rare Promo release by The Pokémon Company. The holo finish adds a unique shine to this standard-sized Pokémon TCG card, making it a valuable addition to any collector's deck.