Fiend Binder

The attack trigger is built to clear a path rather than win a race. Tapping a defender each combat means a single attacker can keep one blocker off the board indefinitely, turning this 3/2 into a recurring source of pseudo-evasion: the creature that would have eaten this one is simply not there when damage is dealt. Critically, the tap targets a creature the defending player controls, and it fires on attack, so the relevant blocker is gone before blocks are even declared, with no way for the opponent to respond by reassigning it. That distinguishes it from the Falter-style effects that tap or remove a single blocker as a one-time spell; this is a renewable version stapled to a body that has to survive combat to keep doing its job. The weakness is in that toughness: a 3/2 trades down to almost anything, so the engine only persists as long as the binder stays out of harm's way, which is exactly why the design hands it the tool to remove the creature most likely to harm it. It sits with white's small aggressive creatures whose value is in dictating combat math rather than overpowering it, the kind of soldier that makes a board of mediocre attackers behave like an unblockable one.