Spoiler :
I've insta-killed three shadow encounters in a row from ambushes, which is probably thanks to Ryuji's Rank 7 ability, but that insta-kill rate seems awfully high and Ryuji's not even in my active combat party, so I wonder if that's normal behaviour or an effect of the rainy season on Mementos or because I'm ambushing low-level shadows or some combination of all these things. Also, I get a mask every time it happens which is kinda insane.