| Offense Mastery Tree|
|Other Mastery Trees:|
|Defense · Utility|
Effect per rank
- Grants 15% magic penetration.
- Requires 8 points in Offense.
- Requires 4 points in Sorcery.
- The percentage penetration from this mastery occurs after flat penetration from items/runes/etc.
- The penetration benefits all sources of magic damage including:
- All champion abilities that deal magic damage.
- Items with actives that deal magic damage such as .
- Items with on-hit magic damage such as .
- Combining with Archaic Knowledge only yields 49% magic pen, rather than 55%, implying % Magic Penetration scales multiplicatively.