On the surface, Bello is yet another Gruul Commander who wants players to attack often and hit hard while they're doing it, but what sets Bello apart are the kinds of cards he guides players to assemble in their deck lists
The best aspect of Reckless Endeavor is that you can choose the value of the die to deal damage and to create Treasures
If you want to improve the deck further and have the budget to do so, Arthur - Wizard's Apprentice is a very good card in an aggressive bounce deck
And if the creature has 6 or more power, she also damages all of your opponents equal to her power
Giving those tokens a +1/+1 bonus counts for a sizeable advantage when you have five, ten, or even fifteen Zombies on the battlefield
However, consider her as a pseudo-Overrun as part of your 99