When your say Brokers Hideout enters, it creates multiple triggers
Smothering Tithe, Crested Sunmare, and Ancient Gold Dragon can get your token engine going so you always get that extra card, and Bennie can even draw on opponents turns
You cant forget, too, the addition of Golgari (GB) lands from unfinished cycles
The optimal manabase is likely four Riverpyre Verge, four Spirebluff Canal, and a couple of Thundering Falls and perhaps a Soulstone Sanctuary or two for value, but this adds a ton to the budget
Avacyn, Angel of Hope Speaking of big threats, one of the biggest, most powerful angels in all of Magic is Avacyn, Angel of Hope
Each ability can only be chosen once each turn but pair it with the likes of Escape Protocol to blink it and you can activate abilities as much as you're able to