Diana's w skill did 1378 damage against 112 MR

https://www.twitch.tv/theokolesm/v/74094999

Look 06:13:09

Bug or what? Diana's w damage can not 1378 damage against 112 MR. Totally 2678 damage in one second.

Riot you inform us.

I think bug because Diana's w ap ratio 60%.