From the introduction:
Welcome to the Critical Mediocrity deck, the ultimate tool for severe averageness.
What the heck is Critical Mediocrity?!
This deck is specifically designed to introduce some randomness and rare, interesting events to a campaign, without being as extreme or punishing as critical hit and critical fumble options. So the impact of the critical mediocrity deck is felt more often but represents the kind of minor give-and-take common in combat rather than examples of the very best and very worst things that can happen. This has the advantage of shaking things up with unusual and unexpected events without everyone cringing and preparing for the entire combat to take a sudden turn when a card is drawn. The idea is to shake things up a little and add some flavor and interesting opportunities, rather than inject wild swings of radical results.
A print-and-play card deck, with instructions and suggestions for use.