I use the sentiment To everything there is a season... and heat embossed one in white on vellum and one in black on plain cardstock and layered with a scrap of designer paper and then placed it on a card front.
I think these challenges are always fun and look forward to seeing what you will do with them. I've learned many new techniques and get a lot of inspiration from your creativity. You don't have to use Repeat Impression stamps but if you do, your name will be entered twice (2x) for a random drawing for a really nice gift certificate from Repeat Impressions. Check out Wendy's blog, The House That Stamps Built for the complete guidelines and link your project there.
You might want to check out what these Rock Star Designers have created to inspire you. Good luck - and I'm looking forward to seeing your projects.
Thanks for looking at my card - have a happy stamping day!