Early game it is a strong deterrent against a creature-heavy deck
If an ETB deck can be built to be very strong, this artifact will double the ETB bonuses beyond a certain point in the game
This means that you should wait before the price drops, and then you can start buying it for future trading
The only other complaint is the visual look of the cards, they look cluttered and make it hard to appreciate the artwork on the card
(2022-10-14) If the copied permanent is copying something else, then the token enters the battlefield as whatever that permanent copied (with the listed exceptions)
Appearances aside, this Gengar is incredibly rare, as NM copies are rarely available on TCGPlayer, with no sales recorded for the first-edition Holo version of this card in recent times