A couple hours ago I found a pretty insane glitch that could change the game as we know it. After discussing this issue with a few friends, I decided it's best to share the glitch in its entirety with the community. Without further ado, here is a step by step process on how to make a 24-card deck!
1.) Buy a minimum of 6 daggers, if you don't have them already. Dagger is the only filler card that works because it has a card value of 0, presumably because it was the first card added into the game.
2.) Create a deck of the 6 daggers and the 24 cards you want in your end deck. Since your deck has less than 30 cards with a positive card value, Elements has a second test for deck size including a test for how many daggers you have in your inventory minus those in your deckbuilder.
3.) Enter a game of PvP1. The glitch only works on PvP 1 because it has the worst servers, which caused Zanz to bypass the coding that tested sold cards while in game, in order to keep the game running fast enough.
4.) Open Elements in another window and sign in. Change your deck to anything that doesn't use any of the 30 cards from your previous deck. Preferably you should build a rush deck.
5.) Go to the bazaar and sell all of your daggers. Continue playing the PvP1 game in the first window.
6.) In the second window, return from the bazaar and immediately start a second PvP 1 game. Doing so basically ties the two windows to the same save file, as opposed to a different location in the server. It is crucial that you start the second PvP 1 game as quickly as you can. If you are to slow, the process could fail. Continue playing the original PvP 1 game; you can't let it end just yet.
7.) Once you're in the second PvP 1 game, you need to end it as soon as possible. Quitting the game will merely replace yourself with the AI, prolonging the game more than necessary. The best strategy is to try to rush your opponent as fast as possible.
8.) Hopefully, you have completed steps 4 through 7 before your original PvP 1 game finished. If it finished too early, you need to restart the process at step 1. But if you completed all of the steps before original PvP 1 game ended, you have done everything correctly. Complete your original PvP 1 game and return to the menu. Do not go to the deckbuilder, because that will require you to restart the entire process.
9.) Your new deck will now be the original 30-card deck, minus the 6 daggers because you sold them. You have successfully made a 24-card deck! You can now farm AIs and even enter PvP games with significantly more efficiency, having been able to drop 6 cards from your standard deck. Be sure not to return to the deckbuilder, unless you want to build a new deck.
I hope you found this guide informative and easy to follow, but you can ask any questions in this thread. If you have any criticism of my guide or doubt the legitimacy of it, please wait a day or two so that everyone has a chance to first read the guide.
The game has changed. 24 card decks are the future, and we're part of it.