The Rainbow Energy (183 / 168) card can be found in the Celestial Storm set.
Recently sold 3 times and based on those sales is worth around £13.78.
Currently, there are 8 open listings for this card on ebay.
This card sells in the range of £10.45 to £17.11, making it stable.
This Rare Secret card was illustrated by Takumi Akabane.