It's a great card, and has neat synergy with firebending, since you can spend the temporary mana you get from your firebending attackers to fuel Zhao's ability
That being said, Regal Force does have the benefit of drawing off of itself at absolute minimum
We used this term in the context of Constructedyou can build two functionally similar control decks even in formats where different sets are legalbut it also applies to Booster Draft
In recent weeks, Boros Heroic Aggro has risen up the metagame rankings and is currently on the cusp of being a tier one deck
Creature combat is also more of a common win condition in casual, so the same problem applies there
There's not much point wondering about what spells are in his deck, Grand Larceny, since he's mostly going to be playing with other people's cards