Treetop Ambusher

Dash and an attack trigger normally pull in opposite directions, and stapling both onto one two-drop is the whole idea. The trigger rewards keeping the 2/1 on the board, feeding a single +1/+1 to whichever attacker most needs it turn after turn; dash pulls the other way, letting you flicker the elf in for a single swing and bounce it home before removal can answer. Haste is what reconciles them: dashing drops the body straight into combat, so the attack trigger fires the same turn you deploy it. Send it alongside an existing threat and the +1/+1 lands on that attacker to trade up or push the last point of damage through, while the fragile body returns to hand at end of turn rather than dying in a bad block. Attack alone into open blockers and it usually just trades itself away for the trigger, which is why the card wants a board already committed: the buff only ever hits one creature, so its value is in having a good target to point at, not in going wide. The dash cost happens to match the printed cost exactly, so the decision is never about mana; it is purely whether you want a recurring one-shot combat pump you can protect, or a permanent creature you can buff and be buffed alongside. A small, aggressive green piece for beatdown shells that want the two modes to cover for each other rather than fight over the slot.