Fortune, Loyal Steed

The Mount mechanic asks a specific question of every design it touches: what does the horse do that pays for the creature you tap to saddle it? Most answers are combat bonuses. This one is a blink engine on legs. Saddle 1 is cheap enough that any spare untapped creature qualifies, and the payoff triggers at end of combat once this Beast has attacked while saddled: exile it and up to one creature that saddled it, then return both. That timing is the whole trick, and it is easy to misread. Saddling only taps a creature to power the Mount, so the saddler stays home; the horse attacks alone. What you get for committing to the attack is a post-combat reset that fires the enter-the-battlefield abilities on both returning objects. The loop's cost is that the horse must attack (though it need not connect), and both re-enter fresh as new objects: the returning saddler has summoning sickness, so it cannot attack or use its own tap abilities again this turn, though it can still be tapped for Convoke to help cast a spell in the second main phase. You bank the blink through an attack step rather than flashing it in on demand. The 2/4 body survives most combat, so the engine repeats rather than fizzling. Structurally it approaches the value-blink question from the attack step rather than the flash side Restoration Angel works, turning a combat commitment into a recurring source of enter-the-battlefield triggers.