Most of the Fiora Ult complainers G&B be like...
https://www.youtube.com/watch?v=5GgflscOmW8
Lemme help you guys:
R: Grand Challenge
Fiora targets an enemy champion, gaining speed and full knowledge of their vitals. Each time she destroys a weak spot, she deals percent max health true damage. If she’s able to destroy all four weak spots, >>>>or if she destroys at least one before her target dies,<<<< Fiora creates a large and long-lasting zone under her enemy that heals Fiora and her allied champions.
READ ALL OF IT, and if you can't do that, WATCH ALL OF IT
http://news.cdn.leagueoflegends.com/public/images/articles/2015/july_2015/FUA/video/Fiora_R.webm