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Neither Tremors nor Mirkwood Bats sees serious competitive play, so I'd guess this doesn't move the needle too much, but it's an interesting addition regardless
Understanding card rarity is essential for both deckbuilding and trading
A three-mana 3/4 that can remove artifacts and enchantments has all the playability in the world and is a phenomenal rate, and if I were to add it to the actual list, it would get a high spot
That might look like combo wins with cards like Thassa's Oracle and Urza, Lord High Artificer or good old-fashioned attackers, but some way to capitalize on the time you buy with interaction is critical
Whether or not thats the case, its becoming quite clear that Lorcana Locations are going to massively change how we play the game