Dice, action economy, actions, attributes, proficiency, skill -kindda-, and magic scaling. But how does magic work? We're weaving elemental threads together, but how? The threads map to literal elements (air can be any combination of the gasses on the periodic table).
We will always have the appropriate elements available because the threads can be changed. All of this will be done with 1 of 3 parts of the mind represented by Intelligence, Wisdom, and Charisma. Each Attribute has its own way of casting spells.
Intelligence will speak and hear their own words. Wisdom will move. Charisma will exert their will on the world. These requirements come not from MAGIC, but for the character's own body with how it will grab the threads of reality and remake them.