Magic
Discovering a Tradition
When a path or other feature lets you discover a magical tradition, you gain one of the talents listed for that tradition. If you are discovering the same talent a second time, you gain a second talent. If you have four talents from a tradition already, you instead learn a novice spell from the tradition.
Learning a Spell
When a path or other feature lets you learn a new spell, it will specify which tier that spell is. You can then choose a spell of that or any lower tier from any of the traditions you have discovered.
Alternately, you can choose a spell you already have learned. If you do this, you increase the number of castings for this spell by the number of castings the spell normally grants. For instance, if the spell normally allows for 3 castings, you would have 6 castings for it after you select it a second time.
Castings
Normally you can cast any spell you have learned once, but some allow for more castings. You regain all castings after you rest.