Please watch this movie, especially 1:07~

I found a RTA movie in "niconico douga" in Japan. As you know, this player gets 1.5~2 times damage against the enemies on the focus attack "殺". How can we do this? I tried various methods, but I could not do this.

If you have any information, please advise me.

On 17th June 2021 or so, the latest patch is going to apply. So, how are tabs separated?

1. Every versions
2. no matter what versions
3. other

What do you think of this matter? Any opinions are appriciated :)