The effect looks like a druid's Regrowth cast on you.
I have not seen it proc with critical hits from abilities such as Mangle, Swipe or Shred,
but it does proc with Maul criticals (because it's a 'next melee' attack).
Indeed, it does not proc with every white crit.
But it does proc frequently - more than once per 10 seconds - in cat form.
It procs less frequently - but still more than once per 30 seconds - in bear form.
-- Thus it seems to have a per swing proc chance (not ppm).
It can proc twice in ~3 seconds, so it is safe to say there is no internal cooldown on the effect.

I did not keep track of the amount of procs I got versus the amount of white criticals, so I cannot calculate a proc chance... but it seemed to proc roughly half the time.

Комментарий от 111153

Are The Runes Still Stackable, Because It Is Not Letting Me Cast The Same Rune More Than Once...

Комментарий от Venroh

Confirming this does have an internal cooldown.

I tested it twice over a minute, and the times were very similar (maybe 1 second off). Here were my times:

0:02
0:11
0:23
0:31
0:38
0:52

Give or take a couple of seconds on my part, I'd say the IC is around 7-10 seconds.

Комментарий от kosmicfoo

I stepped into a normal 5man ToC and it doesn't work in there. Told me i need to be in icecrown. As of Aug, 15 2009
GM reply: That is because you are inside of an instance server that does not count as Icecrown. I do apologize about that, it's simply a matter of zoning.

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