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For the Legends of Runeterra icon.png Legends of Runeterra card, see Catalyst of Aeons (Legends of Runeterra).

Catalyst of Aeons is an advanced item in League of Legends icon.png League of Legends.


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

Cost Analysis

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

Gold Efficiency*

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

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.

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.
Freljord Crest icon.png

Patch History

V9.1 - January 21, 2019
  • Renamed to Catalyst of Aeons Catalyst of Aeons from Catalyst the Protector Catalyst the Protector.
  • Total cost reduced to 1100 Gold 1100 from 1200 Gold 1200.
    • Combine cost reduced to 350 Gold 350 from 450 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.


List of Items

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