booster box burning shadows Pokémon TCG: Sun & Moon: Pack and Marshadow Burning Shadows Charizard Hunt (376

By revealing a fusion monster in the extra deck, the player can Special summon one of the revealed cards named fusion materials from either their hand or extra deck, but the summoned card cannot activate its abilities or attack until after the opponents next turn

For the loop you need two Mizuho on the field to destroy so Shinai can add the destroyed one back to the hand

So, what does a dragon deck powerful enough to destabilise the meta look like

Some other archetypes I could recommend that I do not know as well: Mimighoul (flip archetype with no hits and tons of extenders), Artmage (lots of extenders, and the Field Spell appreciates discard fodder), and Nekroz (ritual archetype with a decent toolbox, although a lot of generic Ritual support cards are pointed)