dave2008
Legend
No, you could have been joking. There was an entire UA on the bastion system: UA Bastions and CantripsHonest question.
I know what the word means in day-to-day use. I don't know what it means, how it is used, or how it functions in play for D&D 5th Edition.
Should I be asking dishonest questions?
Basically it is a new subsystem that give PCs access to strongholds. It has been confirmed to be in the 2024 DMG (in some form).