Yes, there's a fountain that gives this blessing and another that gives a 100% learning increase (the learning bonus drops as soon as you leave the scene). The strength of the Atos blessing depends on the number of people in the scene when you get the blessing.
Listing here of all the blessings https://sotawiki.net/sota/Blessings Pretty sure they are all on there.
How did you get that? The ONBEs with Lord British? This was the first time that I had seen enough players to get the "powerful" version.
The blessing wasn't yet finished at the ONBEs, so that screenshot would have come after. We can see the buff was taken with 30 players in zone, presumably the minimum?