The ancient shambler boss in flooded passage ultimate difficulty had the new reflect mob icon.
I don’t think he should have this I’ve never seen him do a reflect aura he maybe died too fast before doing it? I checked on grimtools and don’t see any mention of it in his skills I think this icon is mistakenly placed on him.
Perhaps I am misunderstanding what this icon means it’s like a sun with spikes coming off it I’ve seen it on other reflect mobs before and remember reading something about this in patch notes if I’m not mistaken.