Flashback 4UU
Helps protect against dust, shelf wear, and light handling
Both have been recently reprinted, and neither ended up getting used
Andril, Flame of the West Want your creature to put on their Aragorn cosplay for combat
You can really tear up a hand in Premodern if youre on the play with black by, say, turn one Dark Ritual into Cabal Therapy, then playing a two-drop creature, say, Ravenous Rats (making them discard a card), and then flashback Cabal and sac Rats, then Unmask paying the alt cost of discarding a black card
Players can simply insert Mew ex into their decks and deploy it if coming up against a Mewtwo ex, removing its previously straightforward means of victory and, at the very least, allowing for a more dynamic match