LoL Tenacity

So I just heard that they're adding a new stat to League of Legends called "Tenacity" so that they could add a few more items that have the stat. For a list of the items and a discussion on the topic, see this post on the LoL forums. Tenacity is basically the stat that Mercury Treads had before, that reduces the duration of crowd control effects. I believe the way it works, is that each point of tenacity gives you 1% duration reduction of CC. The big catch is that tenacity doesn't stack and you only get the bonus from the single item you have with the highest value. At this point, only two values exist, 35 from merc treads, or 25 from everything else you can get, meaning you get 35% CC reduction from merc treads and 25% from any of the other items you can get. I think this change will give many more options to many of the champions in the game that were particularly vulnerable to CC since you no longer have to get merc treads to resist it.

Just for more complete information, here are the new and changed items related to tenacity:

Mercury's Treads (Rework)
Cost: 1200
+35 Tenacity, +25 Magic resist.
Enhanced movement speed 2

Cloak and Dagger :
Cost: 1450
+25 Tenacity
+20% attack speed
+20% critical chance

Moonflair Spellblade :
Cost: 1290
+50 Ability power
+ 25 Tenacity

Eleisa's Miracle :
+25 Health Regen per 5 sec
+20 Mana Regen per 5 sec
+25 Tenacity

It looks like there's a tenacity item here for almost everyone that could want one. Here's the patch notes video if you want to hear about the changes straight from Riot: