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 energy. Abjuration is creating forcefields or protecting/shielding yourself. Transmutation is manipulating the physical properties of both items and people like in Fullmetal Alchemist. Divination is for revealing or granting yourself knowledge and information about something, such as seeing invisible enemies or identifying magical items. Enchantment is basically mind manipulation like hypnotism. Illusion is manipulating people and creatures senses; this could be vision, hearing, or body temperature. Graviturgy draws bodies of matter together or drives them apart, the students of this field learn to further bend and manipulate the violent energy of gravity to their benefit. Chronurgy focuses on manipulating time, altering reality to their liking.
