Magestones

Magestones are the literal cornerstones of magic. Discovered my mannish miners, they are large crystals that store magical energy. The amount energy that a crystal can store grows logarithmically with size. The crystals take energy from the surrounding area and charge like a battery. Extremely hot conditions increase the rate at which the stones recharge their energy. This lead to the creation of stonebanks, where different mages will store their stones while they recharge. Magestones come in many different sizes and usually the type of person will choose what kind of magestones they want based on their specific needs. A charge magestone is noticeable by its heavier weight and electric touch. Holding one in your hands feel like a light current is  going through your body (like those shock pens).

Magic is used by pulling the energy within magestones. The further the distance the stone is from the mage, the less efficiently the energy can be pull. Whenever a spell is cast or formed, that energy put into the spell is released back into the world. Creating a cycle where the energy goes into the magestones, and then is released through magic. The use of magestones requires long hard training, which involves partial ingestion, long series of meditation, and physical workouts to keep the mind and body in top shape. Unlike some other fantasy settings, there are no frail men who are mages. They all require physical strength to pull out the energy from the stones, not to mention that the stones themselves are very heavy when charged.

A mage must learn the "Dreni-Shprltan" technique, which focuses their mind on the particular spell they are casting, while simultaneously focusing their thought on the magestone they want to pull from.

Some mages wear a robe with the inner lining covered in smaller magestones. The cloak is extremely heavy due to the stones and requires a lot of physical endurance and strength to wear. An advantage is that stones are all held close to the body and out  of sight.