Catalyst of Aeons is an advanced item in League of Legends.[1]


Catalyst of Aeons item
Catalyst of Aeons
Gold 1100 (Gold 350)

Cost Analysis

Gold Value
  • 225 health =  Gold 600
  • 300 mana =  Gold 420
    • Total Gold Value = Gold 1020

Gold Efficiency*

  • Catalyst of Aeons item Catalyst of Aeons is 92.73% gold efficient without the passive.

Builds Into


  • With the increased durability and sustainability it provides, Catalyst of Aeons item Catalyst of Aeons allows champions to remain in their lanes longer without needing to recall.

Old Icon


  • The word Catalyst means something or someone that precipitates or causes an event to happen without being used up itself, referring to the item's passive effect.
  • Catalyst mana restore is applied after resistances. The higher your resistances the less mana you will regain from damage.
  • Shields are treated the same as normal health for the damage to mana calculations.
  • The name "Aeons" may be a reference to the Star Craft map Aeon of Strife, by Aeon64, which was the spark that began the MOBA genre.
Arcane Mastery old2 HD

Patch History

  • Renamed to Catalyst of Aeons item Catalyst of Aeons from Catalyst the Protector item Catalyst the Protector.
  • Total cost reduced to Gold 1100 from Gold 1200.
    • Combine cost reduced to Gold 350 from Gold 450.
  • Removed Unique Passive - Valor's Reward: On leveling up, restores 150 health and 200 mana over 8 seconds.
  • New Unique Passive - Eternity: 15% of damage taken from enemy champions is gained as mana. 20% of Mana spent is gained as health, up to 15 health per spell cast or 15 health per second for toggled spells.


  1. Itemlist on

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