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Item was removed in Patch 10.23.
Catalyst of Aeons
ItemSquareCatalyst of Aeons.png
UNIQUE - Eternity: Restore mana equal to 15% of damage taken from champions. Restore health equal to 20% of mana spent, up to 15 health per cast, while toggle abilities can heal for up to 15 per second.


Additional Information
Map AvailabilityALL
ItemSquareRuby Crystal.png + ItemSquareSapphire Crystal.png + 350 Goldcurrency.png
Total Cost: 1100 Goldcurrency.png
Sold For: 770 Goldcurrency.png
Builds Into
ItemSquareAbyssal Mask.png ItemSquareRod of Ages.png


  • This item was previously known as Catalyst the Protector.


  • 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.


Catalyst the Protector Old.png

Patch History[]


Damage taken is converted to mana. Mana spent is converted to health.

For some mages, the world is their 1v1. The current mana items don’t feel great for them, given how many options are aimed at ely surviving the laning phase. We’re making Catalyst the item for constant mage brawlers who want to shoot first, shoot later, and then shoot some more, allowing them to make full use of their skirmishing tendencies.

NAME : [Catalyst the Protector] Catalyst of Aeons
COST : [1200] 1100
ETERNITY : UNIQUE Passive - 15% of damage taken from champions is gained as mana. Spending mana restores 20% of mana spent as health, up to 15 per cast (toggle spells heal for up to 15 per second).


health : [200] 225


  • New icon


  • Now builds into Rod of Ages, Banshee's Veil, Odyn's Veil, and Ohmwrecker
  • Health reduced from 290 to 200
  • Mana reduced from 325 to 300
  • Unique Passive changed to "Valor's Reward: On leveling up, restores 150 Health and 200 Mana over 8 seconds."
  • Cost reduced from 1,325 (450) to 1,200 (325)


  • Passive now changed to upon level up, restores 250 health and 200 mana over 8 seconds


  • 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 from 425 to 400

July 10, 2009 Patch

  • Combine cost reduced from 500 to 450