| Offense Mastery Tree|
|Other Mastery Trees:|
|Defense • Utility|
Effect per rank
- Damaging an enemy champion with an ability increases your basic 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:
- 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.