Thought-Stalker Warlock

Discard effects have always fought a tempo problem: the best time to strip a hand is the opening turn, and a creature that discards on entry arrives too late to catch anything worth taking. This body reframes the trade by gating the good half of its trigger behind life the opponent has already lost. If the chosen opponent has lost life this turn, the discard sharpens into targeted disruption: they reveal, and you pick the nonland card that hurts most. Otherwise it drops to an ordinary discard, opponent's choice, a body with some disruption bolted on but a consolation rather than the payoff. The condition wants an aggressive posture already in place, whether that is an early attacker connecting or a burst of noncombat damage landing before this hits the table. Menace and a 2/2 frame keep the creature relevant once the trigger resolves, so the effect lands as a beat in the curve rather than a dead-end value play. What makes the wiring sharp is that this is a conditional you set up rather than one you wait on: the reward keys off the same first-blood plan an aggressive black deck already runs, turning a discard the opponent would normally steer into a directed strike whenever the damage clock is ticking.