I don't think this card will be limited. I mean you have a hard condition to even use it(reveal 1 specific card AND discard one specific card). This mean you need to have 3 cards in hand(counting itself) to even be able to use it.
It's one of those cards that's better in theory than it is in practice. (Coming from someone that mained Koa'ki Meiru's IRL for a long time.) It's a card that's really only useful if you're already in a good position, given it requires Core and an expendable Koa'ki Meiru, which isn't a given. (They also don't benefit much from putting things into the Graveyard, which doesn't help.)