mtg must have commander cards (2018 Edition) Release Notes Kaalia Commander Must haves? :

You can screw over your opponent

Shamanic Revelation is a Green sorcery that lets you draw a card for each Creature you control, which is probably a lot

4- As both permanents enter the battlefield at the same time, you choose the order of skills, choosing first to resolve the skill of Abdel Adrian, Gorion's Ward and then that of Felidar Guardian repeating the loop

In theory, you could get up to two Scion tokens from the myriad copies when they exile at the end of combat, and since Chittering Dispatcher is just a 2/3, it might very well die in combat, giving you another Scion

Its ideal for rebuilding after board wipes or protecting a key engine piece, but it works best when your deck is already feeding the graveyard through self-mill or sacrifice effects like Greater Good