Cutthroat Negotiator

Parley effects have always carried a built-in tension: they hand your opponents cards too, so the payoff has to justify the symmetry. This one resolves that by splitting the reveal into two currencies. Every player draws, which is the symmetric part you pay, but only you cash the revealed nonland cards into tapped Treasure. The design turns the whole table's decks into a resource you harvest, and the more spell-dense the game state, the more the ramp swings toward you. The Treasures arriving tapped is the restriction that pays for the effect: they cannot fuel the same turn's attack or a mid-combat trick, so the payoff is always deferred to your next turn's mana rather than immediate tempo. That deferral keeps a repeatable attack trigger from spiraling into an instant-speed mana explosion. Note that the trigger fires only when this creature itself attacks, not for every attacker, so the reward is tied to keeping this one body alive and swinging rather than flooding the board. That is the real friction on a 4/3: it wants to be in the red zone every turn to keep the engine ticking, but the body is soft enough that a single removal spell or a favorable block shuts the whole thing off. The reward is front-loaded onto the attack, not onto surviving to attack again, so it reads as a value engine that asks you to commit a fragile threat to combat repeatedly and dares the table to answer it.