The sentiment is an Aspects of Design stamp from The Stampman. (Such a pity they had to spell "marvellous" the American way.) It's from a sheet called (IIRC) "Rambling", but I can't find it on their website now. I bought it at a low sale price some time ago, so I'm wondering whether it's now no longer available.
Elusive Images, is coloured with Promarkers and has a touch of Diamond Glaze on the flowers and body, although it's hard to see that in the photo.