Aurelia, the Warleader gives red-white creature decks an immediate extra-combat threat. Flying, vigilance, and haste let her attack as soon as she arrives, and her first attack each turn untaps all your creatures and adds another combat phase. A board that already contains useful attackers can therefore convert her arrival into two attacks without waiting through another turn cycle.
Equipment and attack-trigger creatures are natural companions. Sword of the Animist can search again when its equipped creature attacks in the additional combat, while Sword of Feast and Famine can provide further value from another successful hit. Token armies also appreciate the chance to attack twice, especially when anthem effects make each body a meaningful threat.
Helm of the Host offers a dedicated combo route. A nonlegendary token copy of Aurelia can attack for its own first time and create another combat, with later combats providing further Helm tokens if the setup remains intact. The interaction requires a substantial mana investment to cast and equip the Helm, so it should be supported by protection and a plan for reaching that stage.
Aurelia untaps creatures when her attack trigger resolves, not automatically before every future combat. She also does not grant haste to the rest of your board. Plan which creatures are available to attack and how they survive the first combat, rather than assuming the extra phase alone will overcome unfavorable blocks.
