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


Catalyst of Aeons
Gold.png 1100 (Gold.png 350)

Cost Analysis*

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

Gold Efficiency*

Builds Into


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


  • 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.

Patch History

  • Renamed to Catalyst of Aeons from Catalyst the Protector.
  • Total cost reduced to Gold.png 1100 from Gold.png 1200.
    • Combine cost reduced to Gold.png 350 from Gold.png 450.
  • Removed: Valor's Reward.
  • 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.
  • Health increased to 225 from 200.
  • Total cost unchanged.
    • Combine cost increased to Gold.png 400 from Gold.png 325.
  • Total cost reduced to Gold.png 1200 from Gold.png 1325.
    • Combine cost reduced to Gold.png 325 from Gold.png 450.
  • Health reduced to 200 from 290.
  • Mana reduced to 300 from 325.
  • Passive health gain reduced to 150 over 8 seconds from 250.
  • Used in new item recipe: Ohmwrecker Ohmwrecker.
  • Passive health restore on level up reduced to 250 from 300.
  • Passive mana restore on level up reduced to 200 from 250.
  • Passive health and mana restore now occur over 8 seconds after leveling up from instantaneous.
  • Passive is now unique.
  • Passive health restore on level up reduced to 300 from 425.
  • Passive mana restore on level up reduced to 250 from 325.
  • Health reduced to 325 from 400.
  • Health reduced to 400 from 425.
July 10, 2009 Patch
  • Combine cost reduced to Gold.png 450 from Gold.png 500.


  1. Itemlist on

List of Items

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