The vibrant colors of the Blendabilities markers make this butterfly look so lifelike.
The sentiment is stamped on the inside layer. I was looking for a birthday-type sentiment with a pretty font and I came up with one from the long retired Send A Celebration set. This set has some line images that would be great colored with the Blendabilities so you may be seeing some more cards from this set in the future.
This is the back of the card. It is a bit easier to see the cut away from this view.
Stamps: Swallowtail, Send A Celebration (retired)
Paper: Whisper White
Ink: Memento Tuxedo Black, Blendabilities (Cherry Cobbler, Pumpkin Pie and Daffodil Delight assortments)