To do more elaborate animation effect would take some time to do. If it was desired to have a spinning globe affect on a card, this is what is needed.
1 create a card image with name, cost, artist, card type, and text filled out. no uploaded image is required for this part. save
2 now in gimp you need the same number of copied layers of the card image as you have for your animation(spinning globe) i use 100 for the globe so i would need 100 for the card image.
3 now you need a good eye and patience for the next part. you have to copy each layer of the globe onto each coinciding layer of the card image.(after that take a break) save as a gif
then test it.
i can only imagine what this would look like.