To upgrade your potions to max level in Thymesia, you must gather Alchemy Enhancers. Alchemy Enhancers are a special resource required to upgrade all potions in the game, but getting them may seem tricky. Luckily it is not all confusing where you can find Alchemy Enhancers, as the answer is from mini-bosses. In short, there are mini-bosses in the game that you can find across most levels. Finding these bosses and slaying them is the key to getting Alchemy Enhancers in Thymesia. That said, every mini-boss you slay will drop at least one Alchemy Enhancer that you can use to upgrade your potions.
However, mini-bosses are quite challenging and even more so for new players. Because of this, we highly recommend getting your hands on some decent weapons and leveling up your character by collecting memory shards. Once you are ready and properly leveled up, you can find most mini-bosses during side quests. We also recommend exploring as much as possible in levels, as mini-bosses are often located in secluded areas.
How to upgrade potions in Thymesia
Once you gather a few Alchemy Enhancers in Thymesia, you can use them to upgrade your potions by visiting a Beacon. You can find Beacons on all levels in the game, and they will have a light blue glow and look like a lantern sitting on a chair made of vines. Resting at a Beacon will allow you to upgrade your potions by assessing the potion menu. You can also upgrade your potions by speaking to an NPC called Aisemy or using a crafting table located at Philosopher's Hill.
For more on Thymesia, we at Pro Game Guides recommend the following guides: Where to find the Key to the Market Secret Room in Sea of Trees in Thymesia and What is Thymesia? Gameplay, release date, and more!.