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Catalyst of Aeons

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


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

Cost Analysis*

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

Gold Efficiency*

  • Catalyst of Aeons item.png 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.png 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.

Patch History


  • Renamed to Catalyst of Aeons from Catalyst the Protector.
  • Total cost reduced to 1100 Gold from 1200 Gold.
    • Combine cost reduced to 350 Gold from 450 Gold.
  • 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 400 Gold from 325 Gold.




  • Total cost reduced to 1200 Gold from 1325 Gold.
    • Combine cost reduced to 325 Gold from 450 Gold.
  • 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 item.png 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 450 Gold from 500 Gold.


  1. Itemlist on leagueoflegends.com

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