yugioh card arm thing Left Offering [MIL1-EN015] Super Rare Normal Trap Card Armory Arm - Yugipedia

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

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)

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

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