Scryfall card images for Unknown Events

[Lykrast]

• Scryfall is adding card images for the unknown events, under the set code DA1 https://scryfall.com/sets/da1
• Several cards from those events are in forge #5913 and #6018 (I plan to make more with the rule for card tokens when I get time)
• The implemented ones use set codes like UELAS23 or UEIND23 to distinguish eachother
• No clue how the forge image database thingy work to connect them
• Thought it was at least good to inform of that in case relevant people didn't know that scryfall added those cards

[Jetz72]

Glad to see those properly documented. Might function fine to just change the set code to the one Scryfall uses? Would be good to cache them on the image server too.