Shyvanas Obscene lagg.

When I play shyvana I get obscene amounts of lagg that should never happen on my Gaming laptop. The specs of my machine are in the link I sent. THE only, time I have lagg issues in league anymore is when I play Shyvana. Which happens to be my number one favorite hero. Has been for 3-4 years now. I play anyone else, from Kalista to evelyn and I dont have this terrible lagg issue. I cant really enjoy playing shyvana until it is fixxed which is a shame. I do not happen to know what about shyvana it stems from unfortunatly.