Tragic Fall

In Commander, Tragic Fall occupies the bottom tier of removal options — opponents routinely hold more cards than you after a wheel, a draw spell, or simply playing from a full grip in the early game, so the condition fires often enough to be functional but blanks at the worst moments, like when a well-developed opponent top-decks a threat with an empty hand. Pauper is where Tragic Fall has the most plausible case: the card pool for removal is narrower at common, and in aggressive matchups opponents can empty their hands quickly, making the condition easier to satisfy. In Legacy and Vintage the competition from unconditional removal is so steep that Tragic Fall never makes the cut. Modern has the same problem — Path to Exile and Fatal Push exist, and conditional sorcery-speed removal isn't competing there.