Bujin

Bujin decks spend their hand steadily to feed the graveyard, then drain that graveyard of banish fodder to protect and empower whatever is on the field. The engine pivots almost entirely on Bujin Yamato, whose End Phase effect adds any Bujin monster from the Deck to the hand and then discards one card, turning every turn into a controlled filter that stocks the graveyard with Bujingi support pieces. From that graveyard, cards like Bujingi Hare provide destruction immunity, Bujingi Turtle negates targeting effects, Bujingi Crane doubles a battling monster's original ATK during damage calculation, and Bujingi Quilin destroys any face-up card the opponent controls — all at the cost of banishing themselves.

Because the graveyard must be populated before those effects are available, the deck rewards going first. Yamato sits on the field through the opponent's turn behind a wall of Bujingi responses, and by the second or third End Phase the graveyard holds enough pieces to answer nearly any threat. Bujintei Susanowo accelerates this by fetching or milling a Bujin monster directly off a detach, while Bujintei Kagutsuchi mills the top five cards of the Deck on summon, potentially loading multiple Bujingi in a single action. Bujinki Ahashima provides a more modern route by simultaneously Special Summoning one monster from the hand and one from the graveyard to go straight into an Xyz Summon.

The graveyard, however, depletes with use. Each Bujingi protection effect is a once-per-turn banish, so a sustained offensive across several turns can exhaust the available responses faster than Yamato can replenish them.