Craft Room Challenge and the Stamp Something challenge both have Butterflies as the theme and I had a card that suits this well. The card is made with a box base and the back part stands through the centre of the base.
I used the CB to emboss the layer on the background. The stamp was embossed with gold and cut out before attaching it to the sentiment at the front.
I did a video on making these box cards last year and you can see it here.