Chancellor is a way to up the heaviness of your deck while also offering something to the all important low end
When it comes to Magic: The Gathering, BGS is the most popular and trusted option for doing this
[c]Goblin Chieftain[/c], for example, gives your other Goblins +1/+1 and haste
Ghalta, Primal Hunger and Ghalta and Mavren are the largest Dinosaurs (12/12)
Commander has long been a kitchen-table favourite format and the new Bloomburrow Squirreled Away commander deck shows off everything thats best about the most recent round of Magic: The Gathering pre-cons
This ability reminds me of a rare in Red (Raging River) that was printed way back in Alpha that divided grounded creatures into two sides of a River and then they could only block or be blocked by that side, so this is a clear call back to that, but color shifted to Azorius, which makes no flavor sense to me