The best structure deck currently available in Yu-Gi-Oh Master Duel is Magician of Pendulum, due to the decks speed and monster-summoning capabilities
Also boosting the power of Dracotail, however, is Fallen of the White Dragon, a brand-new piece of Branded support thats seen splashes alongside Spenta in OCG versions of the deck
Fighting-type Pokmon tend to be really strong in the TCG, and Scarlet & Violet have a lot of really good ones, including Great Tusk ex, Koraidon, Koraidon ex, the aforementioned Stonjourner, and even Klawf
Also, make it not require Polymerization, but make it so it can be Summoned by (I'll provide my suggested effect later in the review)
It keeps things simple and searches up an enchantment at a reasonable cost as a parallel to Fabricate
While a ton of them can't (or won't) be cast outside of the kitchen table (I'm looking at you, Polar Kraken), they're just such iconic, larger-than-life creatures