You might want to rethink your system, then.
It takes an hour to get a level three keycard.

Is there a way to tweak SCP-914 so that it doesn't produce mastercards or playing cards?
It takes several hundred attempts to get a level 3 card, and then it gets turned into a mastercard or playing card, resetting my progress.

I've encountered what I'm assuming is a bug. SCP-914 will not produce level 3, 4, 5 keycards or keycard omni. If it does, it requires several hundred attempts on fine, and several hundred attempts on very fine. That is too much time for a player to spend in a video game. The odds of getting a playin...