If 1 of your Darkness Pokémon is Knocked Out by damage from an attack from your opponent's Pokémon ex, that player takes 1 fewer Prize card. The effect of Shadowy Concealment doesn't stack.
Attacks
230Void Gale
Move an Energy from this Pokémon to 1 of your Benched Pokémon.
How much is Mega Gengar ex #284/217 worth?
As of November 5, 2026, Mega Gengar ex #284/217 from Ascended Heroes sells for around $651.85 in raw, ungraded condition.
A PSA 10 copy runs about $1,327.50 and a PSA 9 about $847.00 — a 2.0x premium over raw, so condition and grading costs matter here. 13,289 copies have been graded to date, and 63% of them came back a 10 — worth knowing before you pay grading fees.
Prices on this page refresh nightly from live TCGplayer market data and are cross-checked against actual sold prices, so a single inflated listing never becomes "the price". The chart above has the full history.