yugioh barbaros deck ANPR-EN097 Beast Machine King Ür – Super Rare Yu-Gi-Oh! Wiki:Featured Card/Beast King Barbaros

Blue is the most common pairing for the preliminary Pirate decks, given that one-drop Siren Stormtamer serves as an excellent way to push damage through (thanks for Fell Flagship and flying), turn on raid, and protect critical Pirates (like a Kitesail Freebooter keeping Settle the Wreckage locked away mid-combat)

Another factor was the increasing complexity of the game itself

Phlage, Titan of Fire's Fury offers removal, stabilizes the board with its lifegain, and acts as a finisher that can hit for 9, which is also hard to race

Limited production meets massive demand, and the window between "in stock" and "sold out" is measured in minutes rather than hours