Bola Slinger

The tapper-on-attack effect is an old idea (a free Master Decoy that fires every combat), but the wrinkle worth reading twice is where the trigger lives. Backup lets the ability leap off the 2/2 and onto whichever attacker you actually want carrying it that turn, and the grant lasts only through the current turn. Point the counter at an evasive threat, swing, and it taps a blocker aside before blockers are declared; the following turn the ability is back home on the slinger unless another Backup source lends it out again. That single-turn window is the whole reframe: you are not building a permanent transfer, you are buying one well-aimed tap on the turn the slinger lands. The tap resolves as the creature attacks, before blockers, so it clears a would-be defender or shuts off a defensive artifact rather than fizzling once combat is joined, and it only ever catches a single permanent per swing, which keeps it well short of a real lockdown. What Backup does structurally is let a support piece lend its own ability to a permanent that will use it better for a beat, then take the ability back; the slinger's body is filler, and the tap it briefly hands off is the entire reason to run it.