Simian Grunts

Flash and echo rarely share a card, and the friction between them is the whole design. Flash promises an instant-speed surprise: hold up three mana, ambush an attacker, drop a 3/4 onto the board at the end of an opponent's turn. Echo collects the bill the following upkeep, demanding a second time or the creature walks. The result is a body you can pay six total mana to retain, spread across two windows, with the upkeep sacrifice trigger waiting on the far side of the instant-speed ambush. That tension is the point. The flash lets you deploy it as a combat trick or a counterspell-dodging blocker, banking on tempo in the moment; the echo means you are renting that tempo, not buying it. A player can flash it in to eat an attacker, profit from the trade, and let it die on the next upkeep without ever paying the echo, which turns the cost from a tax into an option. Urza's Legacy leaned hard on echo as a way to print aggressive rates with a delayed cost, and pairing it with flash here produces a creature whose actual mana investment depends entirely on how the controller chooses to use it. The 3/4 body sits above the curve for the front half of the payment; the echo is the leash that keeps it honest.