• Warmog's Armor is no longer available in Howling Abyss (The Proving Grounds).

V3.03:

• Passive Health Regen reduced to 1% of maximum Health per 5 seconds from 1.5%

V3.01:

• Recipe changed to Giant's Belt + Ruby Crystal + Rejuvenation Bead + Rejuvenation Bead.
• Total cost increased to 2830 from 2650.

V1.0.0.152: Rework

• Recipe: Giant's Belt + Ruby Crystal + Rejuvenation Bead
• Item cost: 2650
• Combine cost: 995
• +1000 health
• NEW Unique Passive: Restores 1.5% of your maximum health every 5 seconds.
• This item no longer gains health and health regen per unit kill.

December 21, 2011 Hotfix:

• Fixed a bug where Warmog's Armor would go beyond 350 bonus health on assists.

V1.0.0.131:

• Passive health gain cap reduced to 350 from 450.
• Passive health regeneration per 5 seconds reduced to 10 from 15.
• Health gain per kill or assist reduced to 35 from 45, minion kill reduced to 3.5 from 4.5.
• Health regeneration per 5 seconds gain per kill or assist reduced to 1 from 1.5, minion kill reduced to 0.1 from 0.15.

V1.0.0.129:

• No longer purchasable in the Dominion game mode.

V1.0.0.108:

• Tooltip will now show the current stats on its passive.

V1.0.0.103:

• Combine cost reduced to 980 from 1100.
• Health increased to 920 from 770.
• Passive changed to: Permanently gain 4.5 health and .15 health regeneration per 5 seconds per minion kill. Champion kills and assists grant 45 health and 1.5 health regeneration per 5 seconds. Bonuses cap at +450 health, and +15 health Regen per 5.

V0.9.25.21:

• Health reduced to 850 from 900.

V0.9.22.16:

• Recipe cost increased to 1100 from 1075.

May 15, 2009 Patch:

• Maximum health stack increased to 500 from 400.
• Health regeneration per 5 seconds cap increased to 62.5 from 50.

April 18, 2009 Patch:

• Recipe cost increased to 1025 from 765 (total cost to 3000 from 2740).
• Added a cap for bonus health / regen of +400 Health, and 50 Health regeneration per 5.
• Health gain per kill modified to 4 from 5 (to 40 from 25 on champions), and regeneration per kill modified to 0.1 from 0.05 (to 1 from 0.5 for champions).