Dracosaur Auxiliary

The Mount mechanic hangs on a tension: a creature that pays off only if you spend other creatures to saddle it, and saddling is a sorcery-speed cost that ties down bodies you might rather send into combat. This one resolves that tension by being a fully functional threat before the saddle ever happens. A 4/4 flier with haste is already a real clock the turn it lands, so the saddle is upside rather than a tax you owe. Tap three power worth of creatures before combat and every attack pings 2 damage anywhere you want, which is what pushes it from a serviceable evasive beater into a reach engine: two to the face, two to a blocker, two to clear a planeswalker's last loyalty. The design smooths over the mechanic's usual awkwardness because the creatures you tap to saddle are ones that have already done their work as a swarm, and the flier carries the damage over the top while they hold the ground. Saddle 3 rewards a wide aggressive deck, though a single big creature can also foot the bill. It sits in the line of red fliers that ask you to already be ahead and then convert that lead into inevitability, with the twist that the conversion is a repeatable, aimable burst rather than raw evasive damage.