User blog comment:Hamengeri/Hamengeri's small item overhaul/@comment-10958553-20140915143011/@comment-10958553-20140916044512

Crit chance is hardly random. Did you know that Characters actually have two crit chances?

You have the "Regular" Crit chance that is displayed and then the adjusted one that is actually used.

Each time your attacks are not a crit (assuming you have any crit at all) The chance for your next one goes up by a percentage of your crit change (a percent of a percent is fun). And each time you crit, then goes down by a percentage. If you have more crit change then your regular and you crit it is reset before being lowered, and vis versa.

Crit chance is one of those things they rigged in between season 1 and season 2.

In league, with a 50% crit chance, it is not possible to crit 10 times with 10 attacks.