I began with the burgundy cardstock and stamped some leaves randomly using Versamark. I embossed this with black, fine detail embossing powder and then using an empty water brush, painted with bleach (Milton) inside the leaf shapes. To speed the process up a little, I used my heat gun on the back of the card so as to dry out the bleach but not burn the embossing. This also seems to give the variation in colour where there's slightly more bleach.
The sentiment is Stampin' Up.
I don't know if this fits with any challenges, but as A Crafty Little Place has an Anything Goes Challenge, I'll add it to that!