Saprazzan Heir

The reward attached to the wrong half of combat. Almost every "becomes blocked" payoff in the game's history sat on a creature you wanted to attack with, and the trigger was a consolation prize for being stopped: drawing or pumping when the defender chumped. Here the consolation is so large (three cards) that the calculus inverts. The tiny body becomes the bait rather than the threat. You are not attacking to deal one damage; you are attacking to dare the opponent into making the block, and either outcome serves you. Let it through and you have nudged a creature past their defenses for free. Block it and you have spun three cards off a two-mana investment. That fork (do nothing or hand the attacker a windfall) is the actual design, and it makes the Merfolk a soft Howling Mine where the opponent controls the dial. The catch is built into the same body that makes it cheap: a 1/1 is trivial to ignore, and a patient opponent simply never blocks, leaving the trigger inert. What it actually wants is a way to force the block, a Lure-style effect that strips the opponent of the choice, or a board crowded enough that no non-block is profitable. That is a narrower ask than three cards for two mana suggests. A genuinely strange little engine, built around the rare premise that getting your attacker stopped is exactly what you were hoping for.