Unique – Cold Steel:
If you are hit by a basic attack, you slow the attacker's
by 15% for 1 second.
Warden's Mail is an advanced item in League of Legends. 
For to be considered 100% gold efficient, the passive would need to have a value of 150g.
is very useful early in the game against autoattackers. For skirmishes while laning, its armor provides good survivability and its attack speed slow is valuable, especially against champions that rely on their autoattacks to deal damage.
Recipe changed to + + 450g = 1050g.
Total cost increased to 1050g from 1000g.
Armor reduced to 45 from 50.
Attack speed reduction increased to 15% from 10%.
Attack speed slow on being hit reduced to 10% from 15%.
+ 280g = 1000g.
Passive slow duration reduced to 1 second from 1. 5.
Cost reduced to 1000g from 1100g.
Attack speed reduction reduced to 15% from 20%.
New recipe: + + 500g = 1100g.
Cost reduced to 1100g from 1350g.
Combine cost increased to 500g from 400g.
No longer grants health regen.
Passive slow changed:
Movement speed slow removed; now only slows the attacker's attack speed.
Chance to slow increased to 100% from 20%.
Attack speed slow amount reduced to 20% from 35%.
Added to item recipe for .
Armor reduced to 50 from 60.
Health regeneration per 5 reduced to 20 from 25.
Fixed a bug where was not slowing attack speeds.
Recipe changed: removed.
Armor reduced to 60 from 81.
July 10, 2009 Patch:
Slow reduced to 35% from 40%.
June 12, 2009 Patch:
Movement and attack speed debuff increased to 60% from 50%.
May 29, 2009 Patch:
Movement and attack speed debuff increased to 50% from 40%.
May 23, 2009 Patch:
proc no longer deals damage and stuns for 1 second; it now slows movement and attack speeds by 40% for 3 seconds.
May 15, 2009 Patch:
Stun modified to 1 second to all units from 0. 5 seconds against ranged units only.
Fixed a bug that caused to get bonus damage from ability power.
Alpha Week 5:
30% chance to take half damage changed to a 20% chance on being hit to deal 40 damage and stun the attacker for 1 second (0. 5 seconds if ranged).
Alpha Week 2: