What you were expecting to happen, and what actually happened?
From reading the text I assumed the “remove X from a random skill” would randomly effect att, armor, health, or magic. However if the RNG rolls health or armor, nothing happens. For example if it says does 12 dmg and remove 12 from a random skill, if it rolls health or armor it will do only 12 dmg and nothing else. If it rolls attack or magic it will deal the 12 dmg AND remove 12 from that skill. So either it’s broken or the wording is bad. It should be doing 12 dmg and then removing 12 from whatever skill it rolls INCLUDING health and armor.
What are the steps to make it happen again?
just use Herald of Chaos ability on an enemy.
Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!
No but I can provide one if necessary.