Shinen of Life's Roar

The Lure effect, split in two and stapled to a body that wants to attack into it. As a 1/2, the printed forced-block clause is a sacrifice waiting to happen: every defender ganging up on this Spirit is the point in a deck full of trample and going-wide aggression, since the body soaks the blocks so everything beside it walks through. The channel cost is where the design earns its keep. Discarding the card slaps that same forced-block onto any creature for a turn, which converts a narrow attacker into an instant-speed combat tool with no board presence required. Held in hand, the same effect becomes a fight enabler, a trample-through trigger, or a one-sided combat blowout, paid for with a card rather than a permanent. That second mode answers a real tension in green's aggressive shell: the dead draw late, the creature you no longer want, now reborn as a removal-grade combat trick. Forced-block effects are old (Lure reaches back to the earliest sets), but routing one through a channel discard splits the card into two decisions you make at different points: cast it as an attacker now, or save it for a turn when discarding it wins a combat outright. The choice between the body and the discard is the entire card.