Dungeons & Dragons - Magic/Ki: Has multiple magic systems depending on your class. Wizards learn magic through studying and writing down spells in their spellbooks. Warlocks create contracts with unknown entities like demons, celestials, eldritch abominations, etc., to be able to use magic. Sorcerers are born with magic in their blood. Clerics and Paladins devote themselves to a god or to an ideal and channel their power into themselves to use magic. Druids and Rangers draw magic from nature. Artificers invent a variety of tools to channel their magic. Monks use Ki via harnessing energy that flows in their bodies. Magic in this universe is very broken like "Power Word Spells". You also have different types/schools of magic like Conjuration that deals with creating objects/creatures or making them disappear. Necromancy is manipulating life and death via resurrection or draining their life. Evocation is unleashing raw magical energy upon someone via creating fire, ice, or pure...