|Offense Mastery Tree|
|Other Mastery Trees:|
|Defense • Utility|
Effect per rank
- Damaging an enemy champion with an ability increases your auto attack damage by 1%, stacking up to 3 times (max 3% damage increase) for 5 seconds.
- Requires 12 points in Offense.
- Requires 1 point in Spell Weaving.
- A stack of Blade Weaving will be granted for dealing damage with any ability that is not a passive ability, deals true damage or is originated from items.
- This includes any Empowered Attacks like Poppy's Devastating Blow and Cho'Gath's Vorpal Spikes.
- Single target abilities that deal damage over time.
- Any attack enhancements like Nasus's Siphoning Strike and Darius's Crippling Strike.
- Damaging on-hit effects like , and .
- Damaging active ability items like , , and .
- Area of Effect abilities that deal Damage over Time, like Urgot's Noxian Corrosive Charge and Cassiopeia's Noxious Blast, will grant a stack on every tick of damage.
- Season Four