Can someone list the raven stuff?

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Poked around this forum, it looks like a raven makes an ancient knowledge scroll every 10 battles for 5 crystals (essentially +25% XP)

I'm trying for the Max Level Achievement, least I was when I started this playthru. currently level 57, realized I got an ancient knowledge scroll from the frog quest with red hestra and the soothsayer on the viking island after New kordar.

but I would like this confirmed, and the other things about him listed.