The Black Spirit is a mysterious mystical black essence who is one of your companions along your travels. It cannot die and can be called upon by pressing the ' , ' key by default. The Spirit, along with being a major part of the storyline, will also give you quests and tips on how to play the game.
The black spirit will offer quests throughout the game, often these are triggered by exploring new areas, accepting quests or reaching specific levels. Some of the quests will have you explore ancient artifacts that empower the ancient spirit and unlock new abilities.