Chance-Met Elves

Green does not usually care what sits on top of your library, and that mismatch is the entire premise here. A 3/2 for three that grows a +1/+1 counter the first time you scry each turn ties a permanent stat reward to an effect that historically lives in blue and white, on cheap enablers and card-selection instants. Pinning it to a green Elf Warrior asks a deck to reach across colors for its triggers, which is the friction the design leans on: left in a shell that never scries, this is a vanilla body whose clause never fires; built around, it is a threat that scales for free on turns you were already going to filter. The once-per-turn clamp is doing the real balancing work. Without it, a shell stacked with scry effects could pile three or four counters onto the body in a single turn and outpace everything on curve; capped at one growth per turn, the counters accrue at the rate ordinary play actually feeds you scry triggers, so the reward tracks a normal game's tempo rather than a combo spike. Because the counter comes from a triggered ability, it uses the stack: an opponent can kill the creature in response, or answer the trigger with a Stifle effect. But the growth costs no mana and demands nothing beyond the scry you already wanted. The counter, not the base body, is the point.