Mana Tonics
Potion
Lesser Mana Tonic. Action: Pour or throw (Range 4) to recover 1 Mana for 3 rounds. Doesn't stack.
Mana Tonic. Action: Pour or throw (Range 4) to recover 2 Mana for 3 rounds. Doesn't stack.
Greater Mana Tonic. Action: Pour or throw (Range 4) to recover 3 Mana for 3 rounds. Doesn't stack.
Supreme Mana Tonic. Action: Pour or throw (Range 4) to recover 4 Mana for 3 rounds. Doesn't stack.
These tonics were originally invented to allow novice spellcasters to practice continual use of magic, until it was discovered how useful they were outside of teaching as well.