Bloodstorm's Hidden Passive

[Herby]

Don't speak in absolutes unless you know for sure. It could be based on the flat value of missing health, or it could be a multiplier on Continuous Rage instead of on Bloodstorm himself. At this point we don't know for sure whether it's strictly on percentage, or on health totals. I'll be conducting a test on this tomorrow to verify which it is.

So again, unless you've actually conducted tests yourself and verified with some kind of repeatable test that it's percentage-based instead of missing health value-based, then don't talk in absolutes, because it's not conducive to obtaining a meaningful understanding of mechanics. I appreciate your enthusiasm and desire to respond in my thread, but we need verifiable results, not gut feelings, in order to understand the true nature of the passive.

We still also don't know whether the damage increase applies to Bloodstorm's physical attack instead of only Continuous Rage. That's another test that must be conducted.

It's not based on flat value of missing health, since I once forgot to put on Bloodstorm's Vitality rune in an entire labyrinth run, and he was doing the usual damage values.
You can test this yourself by removing Bloodstorm's Relic equipment or his Vitality or Endurance rune and hitting others in the arena or labyrinth.

It seems to be a multipler, not a direct correlation to the percentage of missing health.
From today's labyrinth run, without doing direct number crunching, I would say that it is:

x1 damage for full health
x1.5 damage for 50-99% health
x2 damage for anything less than 50% health

I'll test the physical attack values tomorrow. I've used up all my labyrinth runs for today.
I'll try to test with the person beside me in the arena later in the day.