A Hidden Clue to Bard: The Greenglade Caretaker

Alright lore nerds, I need your help... Tell me what you know of "the green glade." Is anything known at all?

As the description says, that card might be a clue to understanding the mystery that is Bard. At minimum, we can say that this sways Bard's origins more towards Ionia than Targon if you consider the fact that Bard Mountain already took place there and the notion that "Great Caretaker" is one of Bard's many names.

However, this isn't certain because we know Bard is a celestial and celestial magic isn't connected to spiritual magic according to this riot guy on twitter?? (can someone clarify this.) https://twitter.com/lauriegoulding/status/1137415463535693824?lang=en