After his rework, Karas perk changed, so there are no bugs nor hidden stats.
Karas full perk
Every 3 basic attacks, Karas’s winds transforms into a devastating typhoon, dealing 120-197 (level 1-12) (+90% crystal power) to the target and nearby enemy units.
However, Karas does cp damage on all basic attacks, not just every 3 like his perk’s descriptions might make you think
Essentially, his “full” perk is like:
Every basic attack, Karas deals 65-131 (level 1-12)(+73% crystal power).
After 3 basic attacks, Karas’s winds transforms into a devastating typhoon, dealing 120-197 (level 1-12) (+90% crystal power) to the target and nearby enemy units.
Something like the first sentence is the missing portion. We figured out the stats by looking at his damage in-game, so it might be a bit imprecise.
As usual, we added it to our hidden stats page: http://everlastingnight.net/vainglory-hidden-stats/
ps: credits to Sketch_chan on reddit for this: You can cancel Karas’s C by activing A.
Karas’s Perk Bug
Karas’s perk will cancel if you recall or cancel the stutter.
A video of it:
Thanks to vsai12 for have found it. You can find another video by him here (only stutter, no recall): https://www.youtube.com/watch?v=cFxG49igWJA
Note that the perk will NOT cancel if you recall in a brush (and the enemies don’t have vision on you. When the Goldoak hit Karas in a brush and he was visible, the perk’s stacks still got cancelled).
As usual, this was added to our bugs page, alongside a few other bugs this patch brought: http://everlastingnight.net/vainglory-bugs/
PS: we also updated the spreadsheet to include his stats: http://everlastingnight.net/vainglory-spreadsheets/