Rotate images for split cards 90 degrees and hide the other half. (Unless it's the top half of an aftermath card, in which case different transformations need to be applied.)
Any card display for a multi-part card that isn't showing all parts (DFCs, flip cards, halves of split cards, meld cards, adventurer cards) should display a little arrow graphic underneath the card display. Clicking the arrow displays the other portion. (Meld cards have two other portions, so IDK what should happen there.)
Add appropriate animations for viewing other parts of multi-part cards. DFCs should turn over, flip cards should rotate 180 degrees, split cards should slide over, aftermath cards should slide and rotate.
If you can think of a good animation for swapping between the card image and oracle text, feel free to add that too. (It shouldn't be the same as any animation for changing the viewed multi-part portion.)
Card names in question text should be colored, and when clicked change the display mode of their associated display from text to oracle and back.
Add an option to default to images unless oracle text is different from printed text, in which case show oracle.
Desired features: