Tusk and Whiskers Stickers are an Un-set mechanic from Unfinity that the community hasnt received well due to its complexity (especially on online platforms like Magic Online), and they were ultimately banned from all formats, including Pauper, Legacy, and Vintage
The others are not tied to specific places, but rather a location-ambiguous Tropical Island, a cavernous Underground Sea, a Savannah, an eerie green Bayou, and a polar bear duo in the Tundra
Matzalantli, the Great Door / The Core This feels better than the often underrated Growing Rites of Itlimoc, and its colorless
Oppressive in all constructed formats, the best limited card you could have, and of course a top pick cube card too
Just from an aesthetic point of view, any fan of One Piece would surely be happy to find these cards in an OP-05 booster pack
Any counter-centric deck should run this