Out of nowhere, indeed
Features a foil-etched Display Commander card, double-sided tokens, deck box, life wheel, strategy insert, and reference card
The Gates of the Underworld Structure Deck is one of the best Yu-Gi-Oh decks, especially for duelists who enjoy Fiend-type monsters and their powerful attacks and effects
As shown on a worldbuilding stream for The Brothers' War on Thursday, there's a (green) subsection of the set that showcases the resistance of Argoth
That deck enables and is built around fun hasters (Froghemoth), tramplers (Giant Ankheg), and changelings with Hamster (Chameleon Colossus)
When the deck "goes off," you can sometimes have turns where you're cycling through 15+ cards while doing other shenanigans, which can take a while and isn't fun for the rest of the table