Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
At the beginning of combat on your turn, choose up to one target creature you control. Until end of turn, that creature gets +2/+0, gains trample if it's red, and gains vigilance if it's white.
Aurelia is an aggressive Boros voltron/aggro commander that buffs your team and snowballs counters via Mentor. Each combat she pumps a creature +2/+0 (with trample/vigilance) while distributing +1/+1 counters across attackers, letting you swing wide or all-in on one threat to close games fast.
Cheap 4-mana commander that immediately impacts the board
Mentor plus the combat trigger grow threats every turn for permanent and temporary advantage
Plays well both go-wide tokens and go-tall voltron
Trample/vigilance keep attackers safe and pushing damage through blockers
Boros lacks card advantage and ramp without dedicated support
Highly vulnerable to board wipes and targeted removal on Aurelia
Combat-focused plan stalls against fogs, heavy blockers, and lifegain
Few non-combat win paths if the board gets clogged