Ahn-Crop Champion

Exert asks a question every attack step: do you want this creature's bonus now, knowing it sits out the next turn's defense? This one answers in the affirmative for go-wide green-white aggro, because the payoff scales with how many bodies are already on the board. Declaring the Champion as an attacker and exerting it untaps every other creature you control right there in the declare-attackers step, so the whole team can swing in and still stand up to block on the crackback (pseudo-vigilance handed to the board) rather than committing to a one-way race. The 4/4 itself is the one creature the untap clause skips, since it untaps all other creatures: it stays tapped through the opponent's turn, paying the full price of the trigger it generated. That is the trade the design makes legible. A team-wide vigilance effect, bought with the attacker who hands it out. The structural cousin is Overrun's swarm logic routed through a repeatable combat trigger rather than a one-shot spell, which is why it rewards a board already in place rather than building one. In a token-heavy shell it lets you throw the whole army forward without conceding the return swing: the opponent takes the damage, then finds every other attacker untapped and ready to receive their counterattack, which usually means there is no counterattack worth making.