I got rekt so bad, brehs.

My opponent was on blue / black / white control but never played anything white which should have alerted me to something but it didn't register. I was on blue / black control and had the game mostly under control until this sequence happened.
Before running out a Demon of Catastrophes I cast Mind Rot when my opponent had 3 cards in hand; they had used Cancel to counter a creature spell so I figured I'd try to bait out another. My opponent goes in the tank for awhile and then discards 2 cards that aren't counters. I have a Salvager of Secrets in hand so to be mana efficient I cast it targeting the Mind Rot.
My opponent draws a card and doesn't play anything. This also should have alerted me to something being wrong but again it didn't register.
Excitedly I windmill slam Mind Rot on my turn with the expectation of clearing out my opponent's hand and casting an ez Demon of Catastrophes. Then my opponent flashes in Chromium, the Mutable.

With Mind Rot still on the stack my opponent discards their other card in hand to activate Chromium, the Mutable's hexproof ability. I have an Essence Scatter in hand instead of a Strangling Spores or Nightmare's Thirst. All I can do is cast a puny Demon of Catastrophes and pass the turn back.
When you give offense to heaven, to whom can you pray?
