Terminal Velocity

Cheating a fat permanent onto the battlefield has a long red lineage, from Sneak Attack to Through the Breach, and the tension has always been the same: how do you let a deck slam its biggest thing without the payoff overstaying its welcome? This answers with a temporary lease and a bill that comes due. The permanent lands with haste, so the alpha strike is immediate, but the end-step sacrifice clause means you rent the body for exactly one turn. What sets it apart from the usual cheat-and-sacrifice pattern is the departure trigger: when the permanent leaves, it deals damage equal to its mana value to each creature. That converts the sacrifice from pure downside into a board wipe scaled to how expensive the thing you cheated was, so the deck is rewarded for reaching high rather than punished for it. The card wants a creature or artifact whose enter-the-battlefield or attack payoff justifies a single swing, then folds the exit into a sweeper that clears blockers for the next turn. At six mana it is not a turn-two shortcut the way Sneak Attack is; it is a top-end play that trades tempo for a guaranteed haymaker plus removal. The design reads as a deliberate softening of the cheat-into-play archetype: no engine to build around the sacrifice cost, just the reset and the finisher handed over in the same card.