What was killing me here?

I died yesterday in this tiny boss room from a debuff I've never seen before:


https://imgur.com/a/Fq85rVL

What is this debuff? How it looks to me there was no chance I could have survived there.

//Edit: also in such cases as you can see I dont *see* either my life/ES bar in the middle of the screen nor on the sides from all the noise on the screen - In such situations (or certain debuffs) I'd like to have a screen wide visual effect (like you get on low life) to realize that something severe is going on.
แก้ไขล่าสุดโดย xxxprod#3532 เมื่อ 2 ต.ค. 2025 02:06:29
ขุดครั้งสุดท้าย เมื่อ 2 ต.ค. 2025 02:25:33
Oh I just now realized that I was rolling into these yellow exploding things which probably killed me then finally - but still the debuff was eating up my ES which I didnt realize until it was over.
Then this was really just a skill issue - the same boss in a different room and I forget what to do with him^^

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