Pestermite

The untap half is the half that mattered, and it mattered in exactly one direction: as the soft side of a two-card loop. Pair this faerie with Splinter Twin and the math runs clean. Twin's host taps to copy Pestermite, the copy's enter trigger untaps the host, and the host copies again, each iteration spitting out a hasty 2/1 flier until the board is lethal. Kiki-Jiki, Mirror Breaker runs the same engine in red. Note which word does the work: not the tap, which the loop never touches, but the untap that resets the copier mid-turn. Because both enablers cast at sorcery speed, the kill assembles during a main phase rather than on some upkeep trick, and the deck typically lands Pestermite a turn early on flash to leave the combo for next turn while baiting interaction. Stripped of that pairing, tap-or-untap is honest minor tempo: tap a blocker before swinging, pinch a land, untap one of your own permanents to bluff a trick you may not hold. The body is a fragile flier doing ordinary work. But the legacy is the loop. In the years since this kind of one-shot untap-on-entry first appeared alongside token-copy effects, the combination has been treated as known combo plumbing: a piece red-blue decks reach for deliberately, and one designers cost and ban with their eyes open.