I've been thinking about a mechanic they could add to Shiva.

- Upon entering the instance everyone gets the debuff (so you can't click it off) "Friction". The goal is to stay warm enough to prevent freezing. There would either be a gauge or countdown to how long you can stay away from others before you become frozen. "Friction" will either make the gauge or countdown go back or reset it. You'd be able to see the area around yourself and others of how close you have to be to receive warmth.

- Twist is that the more an individual is close to others, the more damage they receive from Shiva's actions. They could build around all that jazz or w/e.

- Now for Diamond Dust(her astral flow) before she casts it she could do like Arctic Wind or w/e which would speed up the gauge or countdown dependent on how many people an individual is stacked with, but it will also do damage at the same time to prevent everyone from stacking on one another. It’d probably require like four people stacked on each other (or relatively close) to prevent freezing or dying. Once Arctic Wind (or w/e) is done casting she preps Diamond Dust in which case everyone must separate from each other to avoid death from any type of stacking. Anyone currently frozen will instantly die.