The ability to reduce and cheat the costs of spells is paramount in Commander, and few commanders can do so with aura spells quite like Bruna
I had no interest in using Puca Trade to trade, but one of the reasons it failed was they gave every new account like $15 to spend and a person (me) could make an account, order cards, get them, never do anything, and win
If, however, you value long-term setup, politicking across the table, and making your opponents suffer for daring to hit you, then you're in the right place
Bread and butter blue commons in OTJ With Harrier Strix and Spring Splasher, both Blue 2-drop creatures lean towards aggression, so it will be interesting to see how that plays out