I had 17 life on round 3 and the opponent played "Rush of Dread" and suddenly I was dead...

The card is bugged.

rush of dread not activating despite having alcoloz in play greedy bastards

rush of dread not activating despite having plenty of mana what is this

rush of dread not activativating no matter how many black mana i have

Same issue. Lost from more than 20 life.

Had the sabe issue, I was with 20 lige in a ranked standard match and lost instantly

I have had this happen multiple times on Arena. Every time that card gets cast against me I lose no matter how much life I have remaining. Why aren't you fixing this card?

Have had the same thing 4 times in mobile now, had 7 or more health left and then just died when that card came out, its just an exploit now.

Honestly if you're at 1 life it makes sense, but 40 life and losing doesn't.

it's an evil combo with bloodletter lol

The Bloodletter of Aclazotz + Rush of Dread combo has been around for weeks now. It helps to read your opponent's cards before complaining. Arena may have some bugs, but most of the time what happens is what is supposed to happen.

I was at 16 life, my opponent casted the Rush of Dread and I lose 16 life straight away and lost the game.

I had similar experiences 2 times already.

Those graveyard cards are blocking part of the board, so I have to ask:
Did they have a Bloodletter of Aclazotz on the board?

I was at 20 life. My opponent cast “Rush of Dread” and I lost all of my life. 2024.36.10.1229.1065467

It's not your life total that's halved and rounded up, its the amount of life you lose that's rounded up. Meaning, the spell will make you lose 1 life when you are at 1, since losing 0.5 life rounded up means losing 1 life.