I wanted to keep this card pretty simple to show off the embossed background, so just did one butterfly and the sentiment. One tip with these butterflies, it might be better to stamp the body after you have die-cut the wings. I tested stamping these images a few times on paper before I commited to cardstock.
As well as the square card I decided to make a more postage-friendly standard size version:
Here are the colours I used -
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