Rainbow Slap is one of the six skins released as part of the Miniclip Celebration offer. It could be individually purchased with game coins in mid July 2019.
Rainbow Slap could be purchased in the Skins Shop under the ‘Miniclip’ tab for 490 coins. This skin was available for a limited time and may not be available for purchase in the future.
Details of this skin can vary depending on location, platform or time.
Note: Rainbow Slap has a similar design to the Frost Hand skin.