Im personally thinking of a Modern Infect storm build that made the rounds a while ago, playing off of tutoring up Venerated Rotpriests to the field as quickly as possible and then hitting them with as many Ground Rifts as possible
Like all beholders, Xanathar is a paranoid tyrant that charms and bullies its minions into servitude
While this might look like casual demand, and probably is in part thanks to the enchantment being a popular combo enabler, the major reason for the movement was a Magic-League list which used Training Grounds to enable the Pili-Pala combo
Anikthea, Hand of Erebos Sagas and midrange decks pair well together
So its definitely worth taking another close look to see exactly which foils are in your collection
Add to this the fact that Bagheera is a Bodyguard, meaning your opponent is forced to challenge him before anyone else, and his favorable statline allows for him to banish a character and get banished in return, almost ensuring you deal damage out when he's banished
