Bandai Namco recently held a stage event for Tales of Arise at TGS 2019, and provided some new information on the game. In the world of Tales of Arise, Astral energy resides in all things, with Renans being able to use special Astral Artes by channeling this energy. Alphen's fire sword is a power manifested by Astral energy, and only Aplhen can use it, due to his inability to feel pain.
You can check out a new trailer for Tales of Arise below. The game is set for release on PS4, XB1, and PC sometime in 2020. Stay tuned to RPGFan for more info!