The "Guilty soul" weird message

Donrefre

I was watching Seatin's latest video on 5 star Black Widow gameplay and I've noticed a weird text popup during the vulture fight (screenshot below).
This also happened to me twice and I was wondering what this message means... cause I think it's a little creepy 😅
The first time I saw it was during a fight against Mefisto and I thought it was something that he says whenever he faces a villain champion, but a few days ago it happened again in another match
without facing or using Mefisto.
And now also in Seatin's video...
Any explanations on this?

NerdNerdNerd1

Its claires synergy, against a villain you gan 10% extra dmg.

dr_nish777

Like with nick fury it says fury boost similarly with claire in team and fighting against villans it says guilty soul.

Donrefre

Ok but when this happened to me I was fighting in the arenas and I'm pretty sure that there wasn't any Claire Voyant in my team or in the opponent's one...