the secret sauce
Decks like Dragapult ex, Ns Zoroark ex, Festival Lead, and Hide n Sneak are optimized to facilitate attacks that cost one or two Energy, so Ancient Bulwark could cause the opponent to miss a turn of attack or discourage them from spending their Energy attachment for the turn on a support Pokmon like Munkidori
Each card is mechanically unique, and themed according to the characters they represent, including Xenk, Paladin Unbroken, Simon, Wild Magic Sorcerer, Forge, Neverwinter Charlatan, Holga, Relentless Rager, Doric, Natures Warden // Doric, Owlbear Avenger
Originally a high monster-count aggro Deck, the release of Storm of Ragnarok shifted it into a combo Deck, with "Legendary Six Samurai - Shi En" acting as a strong endboard piece (especially for the time), and various searchers ("Shien's Smoke Signal", "Reinforcement of the Army", and "Gateway of the Six") enabling higher consistency
Commanders like Zimone and Dina and Braids, Arisen Nightmare can sacrifice these cheap recursion creatures multiple times for great payoffs and synergies
The icing on the cake is that it gives the rest of your board haste, which means you can pump a sorcery speed token spell, get an instant board, and then use that board to refill your hand