Originally posted in this thread, but linking again here for visibility.
Credit to LynnCUBE for the original spreadsheet documenting the changes implemented by Rise, and to everyone who contributed.
The drop location lists are not complete, but should give a general idea of where to look for particular scrolls. Feel free to leave a comment in the spreadsheet if any information is missing or incorrect.
Also see SirRFI's Enchant guide for more information about enchanting and scrolls, including scrolls that no longer drop in battle.
If you try to use a growth power from the exchange shop before you get wings from the cat, you'll get this message:
So it looks like you need 6 growth powers. I haven't tried this with a magic power but I would expect a similar message. I've also heard from another player that there are 6 stages of each, which means 6 growth powers for complete wings and 6 magic powers to make them brilliant wings. So 150 heart powders to max.
Blood Prince drops 4 heart powders.
Edit: Confirmed only 5 magic powers needed, not 6.