This will be a fun deck to battle with in Pokmon TCG Pocket
From there, you're welcome to send it into combat or sacrifice it to some other effect
Recent data on TCGPlayer only shows lightly played cards, which sell for a bit above $100, but near mint cards are only listed above $400, making it one of the most expensive Gengar cards in the Pokmon TCG
Depending on your budget, size of your collection, and value of your cards, you can start with a convenient option like a D-Ring binder, and work your way up from there
But the practical effect for everyone already playing is a shelf full of new card pool and a promo checklist with a hard expiration date
Thraximundar offers incredible pressure from the command zone if you can make your opponents sacrifice creatures