Countdown Stat Reduction
I was thinking about missing effects in the game. One that came to mind would be to have countdown stat reduction as a new debuff. Obviously where it stacked over time, it would have a minimal effect at the start of the battle but could be significant towards the end. I could see this being the exclusive ability of a toon, a friendship disk or perhaps even a red skill. We have energy over time, damage over time, healing over time, so it would be interesting to see a stat debuff over time not associated with a basic attack or certain ability use.
As an example:
Each second while ______ hero is alive, enemies lose X amount of (armor/reality) per second. This debuff can’t be removed but will occur less frequently on opponents level ___ or higher (reduction every few seconds, reduced this way as well on high tenacity toons)