[Micah]

Umm, Omni, your post has a lot of inaccuracies.

Normal heat/cold penalties are only at level 3. Cold blooded is 4/7/10, not 1 per.

Rigor mortis is not resistable, but only hits half the battlefield.

Heat from hell and grip of winter also only hit 50% per turn and the rulebook says they have a base damage of 5, adjusted for scales and rain (for heat.)

I would imagine that auras are handled like heat from hell/grip of winter..a number +/- scale and then another penalty for rain for heat auras, with DRNs added in.

Being underwater also adds 1 enc.