Ns Zoroark & Reshiram N from Pokemon Black and White and Black 2 and White 2 is the only trainer confirmed so far to be getting more than one Trainers Pokemon card with both his Zoroark and Reshiram being revealed in the trailer
You won't find that one in a LTR Collector Booster, but there's still other serialized treasures to find: The Elven, Dwarven, and Human rings of power each appeared as serialized foil Sol Ring cards (300 Elven, 700 Dwarven, 900 Human) and, as it's usually the case, extended-art and alternate scene cards are exclusive to LTR Collector Boosters
That being said, a land with phasing was a novel idea and deserves some acknowledgement for being groundbreaking
Its appearances in various regions, from Kanto to Galar, keep it relevant and fresh in each new Pokmon installment, ensuring its place in the pantheon of iconic Pokmon
For instance, you could play Elsa, Spirit Of Winter on top of Elsa, Snow Queen.
Very cool colours, and those tiny things swimming alongside it -- each small enough to be swallowed up in a single gulp -- are whales