Legendary Creature — Angel
Flying, vigilance, haste
Whenever Aurelia attacks for the first time each turn, untap all creatures you control. After this phase, there is an additional combat phase.
3/4

Repeatable extra combat phases with creatures, core RW strategy.

Exerts for an additional combat phase like Aurelia.

Extra combats on landfall, similar aggressive payoff.

Alternate Boros Aurelia commander option.

Boros Angel doubling damage for aggressive swings.

Repeatable extra combat phases payoff.

Extra combat phase for big mana, similar role.

Dethrone grants additional combat phase like Aurelia.
→ Infinite combat phases, Infinite creature tokens with haste, Infinite ETB
→ Infinite combat damage, Infinite combat phases, Infinite ETB
→ Infinite LTB, Infinite ETB, Infinite sacrifice triggers
→ Infinite blinking, Infinite combat damage, Infinite combat phases
→ Infinite combat phases, Infinite death triggers, Infinite ETB
→ Infinite combat phases, Infinite creature tokens with haste, Infinite ETB
Aurelia's last ability doesn't give you any additional main phases. This means that you will move directly from the end of combat step of one combat phase to the beginning of combat step of the next one.