Ojutai, Soul of Winter

The trigger isn't a tap effect: it's a soft lock that scales with how many Dragons swing. Each attacking Dragon taps a nonland permanent and holds it down through its controller's next untap step, so a board of two or three Dragons can pin an opponent's blockers, mana rocks, and a threat all in the same combat, and keep them pinned into the following turn. The body it sits on (5/6, flying, vigilance) means the attack costs nothing defensively; Ojutai swings and still stands back to block, so the tap-down accumulates without ever lowering your own guard. That vigilance is the quiet engine here: most "tap when this attacks" creatures force a choice between pressure and protection, and this one refuses the trade. The design lineage runs through Dragonlord-era white-blue control, where the win condition was a single resilient flyer that ground the opponent out rather than racing them; Ojutai's version of grinding is denying untaps, turning every combat into a one-sided Sleep that targets whatever matters most. The catch is that it leads from the front: the lock only fires when a Dragon attacks, so the card asks for an aggressive posture from colors that historically prefer to sit back, and it wants a second Dragon in the air before the tap-down becomes a stranglehold rather than a tempo nudge.