Once during your opponent's turn, if Gengar would be Knocked Out by damage from an attack, you may flip a coin. If heads, the Defending Pokémon is Knocked Out.
Attacks
Shadow Room
Put 3 damage counters on 1 of your opponent's Pokémon. If that Pokémon has any Poké-Powers, put 6 damage counters on that Pokémon instead.
30×Poltergeist
Look at your opponent's hand. This attack does 30 damage times the number of Trainer, Supporter, and Stadium cards in your opponent's hand.
How much is Gengar #18/100 worth?
A raw copy of Gengar #18/100 (Stormfront, 2008) is worth about $69.71 right now, based on the latest market data from November 5, 2026. Across the 2 printings we track, copies run anywhere from $45.00 to $1,901.00 depending on the version you're holding.
Grading changes the math on this one: a PSA 10 is valued around $350.00, roughly 5.0x the raw price, while a PSA 9 sits near $289.90. 205 copies have been graded to date, and 1% 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.