They must usually be Set on the field, and may be activated at any time after the turn they were, including during an opponent's turn
If you love Charizard cards, collecting them is both enjoyable AND likely to appreciate over time
You could even add Loot, Exuberant Explorer or Hugs, Grisly Guardian for extra land drops and card advantage
The SA pull rate (~15% per box for any SA) keeps these cards genuinely scarce
Scurry of GremlinsScurry of Gremlins (3,366 Inclusions, 1% of 517,635 Decks) Now this is what I'm talking about
While Reserved List cards are especially likely to be bought out (which is the most common cause of a price spike) thanks to their low supply and the Reserved List itselfwhich offers a wall of protection around speculators, who don't have to worry about a surprise reprint ruining their investmentolder, low-supply Modern, and Commander cards deal with the same issue, just on a smaller scale