When the HellSinger is on Mordor (Now, I can't recall the real name of the map - LOL), and standing in Lava (I only tested this in a flow of lava not the center), heat didn't rise at all, but the legs took damage.
That's all.
Additional Testing in the Terra Therma (Testing Grounds).
Standing still on rocky ground 4%
Moving full throttle on rocky ground 7%
In the middle of the Caldera Lava Pool standing still 4%
Same running full throttle 7%
Heat never climbed, but damage was applied to the legs in the Caldera as well.
Cheers.
Edited by Aphoticus, 06 August 2014 - 09:56 AM.