If your opponent has no cards, you wait until they do
However, Drytron was vulnerable to many various hand traps such as Droll & Lock Bird , Ally of Justice Cycle Reader and struggled to make plays when the metagame is prepared against them
Cloudstone Curio, on the other hand, kills in a more insidious way
Luckily, fans have seen a few previews of the cards they can expect to be included within these packs, with key artifacts and characters from the video game series appearing in this new medium
But this only works for cards found in main sets and to a lesser extent special sets since they're usually kept in production for a while (and if what TPCi said in the past is true, will continue to be printed as long as there's demand for 'em and they're not rotated out), this rule doesn't work for promos since they're usually only given away during a certain window of time and given a limited print run that's long enough to fit the predicted demand
*Box Topper x1 24 booster packs per box, 12 cards per pack