Looming Hoverguard

Tempo dressed up as removal. The enters-the-battlefield trigger doesn't kill an artifact; it stacks it on top of its owner's library, the cruelest place to send a permanent when the format runs on artifacts. The owner has to redraw the card they just lost and recast it from nothing, eating a draw step and a chunk of mana on the way. Against the equipment, mana rocks, and artifact creatures that filled out early board states, that is a two-for-one in time even when the card count stays level. The flying body converts the disruption into a clock: it stalls a turn behind, then closes the door while the opponent is busy rebuilding what they already paid for once. There is a cost baked into the design, though: the effect is mandatory and color-blind, so with nothing else on the table it has to set back one of your own artifacts, and the six-mana, do-nothing-until-it-resolves shape means it never pretends to be efficient interaction. This is a midrange swing tuned for the artifact-dense board states of its era, the kind of card whose power reads as modest until you count how many tempo points a single top-of-library bounce actually costs the other side.