Cancer is a Zodiac themed skin that was included as part of the monthly release of the Star Pack offer. The series of Star Packs is collectively known as the Zodiac Monthly Deal. The Star Pack with the Cancer skin was available for a limited time in mid June 2017.
Cancer and a package of either 7000 coins (Browser) or 800 DNA (Mobile) could be purchased for $4.99 as part of this Star Pack. This skin was not available for individual purchase and may not be available for purchase in the future.
Details of this skin may vary depending on location, platform or time.
Note: The Star Pack with the Cancer skin was released again for a limited time in mid June 2018. This time it cost $4.99 and included a package of 400 DNA and a single 3X Mass Boost.