The Golden Fireflies was sold as an addon during the Kickstarter campaign. The publisher states: "We will be releasing small variants in small batches as this will be actively worked on for some time, this doesn't mean the ruleset is incomplete but rather that there will be more content being released through the year that will change the way this expansion plays. When we publish the final variant we will surprise you with some special news for this game for which we've been working during the past few months." There will be a public PDF with the rules available on the publisher’s webpage. So far, there are rules released for the following variants that uses the Golden Fireflies: - The Single Golden Firefly Variant A - The Single Golden Firefly Variant B