They were not run as CE proofs, the two were both run off of Beta with a different die cut. Wizards distributed approximately 50 copies of each beta artist proof to the artist who created the featured artwork
Ugin is better than most other Wraths at dealing with the relevant threats in play
He's also one of the best cards in this set for creating clue tokens, letting you investigate for each non-token creature that attacks whenever he does
Since these tokens arent creatures, they wont have any sort of Summoning Sickness to worry about, allowing you to tap your Food immediately
I've had fun and success playing her presiding over a sleek, streamlined cEDH tempo/reanimator deck
Because these cards are the last versions of the base set, theyre not as valuable as the earlier releases but they still could be worth a bit of money to collectors