The red skill text says that the enemy with the highest basic dmg is frozen for 8 seconds at the start of the battle. This isn’t happening for me. The one thought I had was that it’s level based like the energy gain.
Some heroes have Tenacity, where they are able to resist disables
Only a few are naturally immune to disables, like Kevin Flynn and the Mad Hatter
I did some testing. The skill works on lower level heroes so the freeze on start is based on the level of the skill, which I will assume is the same as the energy gain.
That is bugged. The energy gain should be the only thing less effective on higher leveled heroes