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Arcane Knowledge

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Offense Mastery Tree
(Season Three)
Summoner's Wrath: Exhaust lowers target's MR/Armor by 10; Ignite gives +5 AD/AP when on cooldown; Ghost now grants 35% movement speed; Garrison now grants 50% splash damage to allied towers.Fury: Grants 1 / 2 / 3 / 4 % attack speed.Sorcery: Grants 1 / 2 / 3 / 4 % cooldown reduction.Butcher: Basic attacks deal 2 / 4 bonus damage to minions and monsters.Deadliness: Grants 3 / 6 / 9 / 12 AD at level 18 (.17 AD per rank per level)Blast: Grants 4.5 / 9 / 13.5 / 18 AP at level 18 (.25 AP per rank per level)Destruction: Increases damage to turrets by 5 %.Havoc: Increases damage by 0.67 / 1.33 / 2 %.Weapon Expertise: Grants 8% armor pen.Arcane Knowledge: Grants 8% magic pen.Lethality: Grants 2.5 / 5 % critical strike damage (doubled on melee champions).Brute Force: Grants 1.5 / 3 attack damage.Mental Force: Grants 2 / 4 / 6 ability power.Spellsword: Your basic attacks deal bonus magic damage equal to 5% of your ability power.Frenzy: Grants 10% attack speed for 2 seconds after landing a critical strike.Sunder: Grants 2 / 3.5 / 5 armor pen.Archmage: Grants 1.25 / 2.5 / 3.75 / 5% increased ability power.Executioner: Increases damage by 5% against targets below 50% health (excluding true damage).Emptylord Offence
Other Mastery Trees:
Defense Mastery DefenseUtility Mastery (tree) Utility
Arcane Knowledge mastery s3
Arcane Knowledge was a tier 3 offense mastery with 1 rank.


Effect per rank

  • Grants 8% magic penetration.

Requirements

  • Requires 8 points in Offense.
  • Requires 4 points in Blast mastery s3.png Blast.

Patch History

V3.14 Removed
  • Removed due to Season Four.
V1.0.0.152 Added
  • Tier 3 Offense mastery with 1 rank.
    • Grants 8% magic penetration.

Offense Mastery Tree
(Season Two)
Summoner's Wrath (Season Two Mastery)Brute Force (Season Two Mastery)Mental Force (Season Two Mastery)Butcher (Season Two Mastery)Alacrity (Season Two Mastery)Sorcery (Season Two Mastery)Demolitionist (Season Two Mastery)Deadliness (Season Two Mastery)Weapon Expertise (Season Two Mastery)Arcane Knowledge (Season Two Mastery)Havoc (Season Two Mastery)Lethality (Season Two Mastery)Vampirism (Season Two Mastery)Blast (Season Two Mastery)Sunder (Season Two Mastery)Archmage (Season Two Mastery)Executioner (Season Two Mastery)Offensetree2
Other Mastery Trees:

Defense Mastery DefenseUtility Mastery (tree) Utility

Arcane Knowledge mastery s2
Arcane Knowledge was a tier 3 offense mastery with 1 rank.


Effect per rank

  • Grants 10% magic penetration.

Requirements

  • Requires 8 points in Offense.
  • Requires 4 points in Sorcery mastery s2.png Sorcery.

Strategy

  • Arcane Knowledge mastery s2.png Arcane Knowledge is very useful to champions who focus on doing magic damage, but keep in mind that percent magic penetration factors in after percentage magic resist reduction, flat magic resistance reduction, and flat magic penetration.

Patch History

V1.0.0.152 Removed
  • Removed due to Season Three.
V1.0.0.129 Added
  • Tier 3 Offense mastery with 1 rank.
    • Grants 10% magic penetration.

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