Outcaster Trailblazer

The engine reward here is stapled to a threshold most green decks already want to cross: four power. Green has always trafficked in oversized bodies, and this turns that surplus into a card-draw trigger that fires on any of them entering, not just creatures cast. That "enters" clause is the load-bearing detail, because it catches tokens, reanimation, blink effects, and cheat-into-play tricks that would otherwise dodge a cast-triggered engine. The mana-on-entry ability smooths the awkward turn where you have the payoff but not yet the payload, and pays for the first big drop the same turn it lands. Plot is the wrinkle that ties it together: exiling it a turn early lets you deploy it off-curve and free up the following turn's mana entirely for the fat creatures whose arrivals you want to bank cards off of, which sidesteps the usual tension of wanting to both play the engine and feed it in the same window. A 4/2 body is fragile by design; the reward is priced against the fact that anything can kill it, so the deck is asked to flood the board with threats quickly enough that losing the Trailblazer to a removal spell still leaves you ahead on the exchange. It is a green card-advantage piece built for the fair-but-fast midrange plan: keep making big things, keep drawing off them, and never let the engine sit idle.