To make a Potion of Healing (Instant Health II), you will need1 Potion of Healing(Instant Health) and 1 glowstone dust. Place the Potion of Healing (Instant Health) in one of the bottom boxes in the Brewing Stand menu. Then add the glowstone dust to the top box. How do you make a...
If they don't have any healing party members, that's when you modify the stock of the town shops and give them hints about short rests, or allow them a respite for long rests on long adventures. If they just want to make them to sell, then they need to understand the re...