But at least so far, none of the Secret Lair drops can really be considered a bad deal from a financial perspective (and this is without considering the possibility of getting a valuable bonus card)
So if anything, I would expect the 30th Anniversary to bring some of them back in, leading to a small uptick in popular Pokemon from Diamond & Pearl, Black & White, and X & Y
You might have to swap up your dungeons a bit depending on the situation, but you have an infinite loop of tracks to follow until you win
Between this suit of abilities, Omnath can provide such a massive impact on a game that it's not hard to see the reasoning behind its Standard and Brawl bannings.
Additionally, this card's ability could double as a sneaky win condition, especially when paired with counter doublers like Doubling Season