Durnan of the Yawning Portal

Undaunted is the wrinkle that turns a modest attack trigger into a scaling one: it strips a generic mana off the exiled creature's cost for each opponent, so in a crowded pod the spell often comes down for its colored pips alone. That is a deliberate inversion of how impulse-draw effects usually scale, where more players just mean more threats to race; here the extra opponents are the discount. Structurally this is an aggressive-attacker toolbox: the exile-and-cast clause fires the moment the 3/3 is declared as an attacker, not on damage, so the reward arrives at the top of combat rather than being gated behind a connection you might not get. That timing matters, because it pays out even into a blocker or a fog, asking only that you keep swinging. The dig is narrow by design: it surfaces creatures and nothing else, refusing spells and lands so the loop never becomes a generic card-advantage engine. Choose a Background is the other half of the identity, letting the tavernkeeper anchor a two-commander pair and hand deckbuilders a second axis without needing a partner in the traditional sense. The result is a green attacker built around a phase of the turn most advantage engines ignore, combat, at the exact moment you are already committing to the swing. It reads modest in isolation and gets stronger the wider the game around it opens up.