Demon Idol contains several rules extensions. These are always marked with an Ex. This mark indicates that the rule is not a part of an official publication. Instead, it's a rule that extends the game in fashion we feel is in the spirit of the rules.
Since Demon Idol is about convention over configuration, we recommend adopting all rules extensions. If you find that a rules extension doesn't work for you, you can throw it out. We also hope you let us know by emailing email@example.com. Feedback is deeply appreciated, and we hope to get a lot of it.
Any rules extensions which have not been sufficiently playtested will be marked as such.