Dog Walker

The reward is stapled to the reveal, not to the body: turning this over doesn't just show a 3/1, it manufactures two 1/1 Dogs the instant the face-up trigger resolves, so a nondescript hidden blocker blooms into a three-body board on your schedule. The timing is the appeal. Because the flip cost can be paid at any time, the reveal happens at instant speed: sit behind the 2/2, then unmask it in response to a removal spell or an attack step to trade up, drag two bodies onto the field, and force the opponent to reassess the whole board mid-turn. The catch that stops it from being a free defensive trick is that the Dogs enter tapped: they widen your board, but they don't backstop the current combat, so the flip converts a lone speed bump into future pressure rather than an emergency wall. Vigilance matters on the front side, where a 3/1 declared as an attacker keeps standing after the swing; it does nothing for a creature already tapped from attacking while hidden, so the aggressive line and the ambush line are genuinely different plans, not one plan you can have both ways. The economics reward patience: three to sandbag it face down, two flexible mana to spring it later, and a payoff that scales with how long you sit on the reveal.