Had a larger post worked up for some suggestions on new possible plants and potion recipes... but lost most my work on a hard drive malfunction! So here is part of it, but will have more to come as I regather my information and put in into a sensible format.
Here is a basic grouping of potion ideas utilizing related Ravenloft herbs.
"Divination Family" Of herbs.
Quovusp Root - Roots native to Hazlan, used in divinations and as a deterrent to unnatural creatures.
- Season: Spring, Summer, Fall
- Locations: Forests (Only in Hazlan)
- Frequency: Uncommon (along the lines of the spawn rate of Purple Bolete)
Bitterblot - Plant native to Barovia used in divinations and curses.
- Season: Summer (Selected Summer because it is currently the 'off season' for most herbs, and little else is said about this plants time, that I can find!)
- Locations: Grassy areas
- Frequency: Uncommon (again, along the lines of the spawn rate of Purple Bolete, don't want a flood of these!)
Herbalism Usage:
Potion of Lore: Requires 2 Quovusp Roots. (DC 20)
Quovusp root is said to be used in divinations and as deterrent to unnatural creatures. As the latter would be hard to form into a simple potion, I elected it to be the basic 'divination' style tonic.
Potion of Remove Curse: Requires 2 Bitterblot (DC 25)
Bitterblot is used in both divinations as well as curses, so though its solo usage would be well placed with Remove Curse. As this spell is a bit more powerful then the lore potion above, I've recommended a higher DC, and the plant would be somewhat more rare, and with limited seasonal availability.
Potion of Remove Blindness/Deafness: Requires 2 Quovusp Roots and 2 Bitterblot (DC 30)
The high end combination of these two plants, utilizing the divination abilities of both for the more powerful divination curative, Remove Blindness/Deafness.