Inscription of Death Throes

Bonus = (your missing HP / your max HP) x 20, added as percentage points of Damage Dealt Bonus. Strictly linear, and the ratio itself bounds it at 20.

Where it lands: It lands in the additive damage dealt bracket of the hit, which is then multiplied by the critical multiplier.

When it runs: Before the hit is calculated, in the phase where effects adjust the attacker's stats.

What it applies to: Every damage execution the wearer originates. There is no melee, physical or basic-attack gate at all.

Worked numbers

150 physical attack power, a 100 percent coefficient basic attack, target at 0 resistance, critical damage bonus at the default 50 percent.

Rule of thumb: Every 10 percent of your own missing HP is +2 percentage points of damage.

Things the tooltip does not tell you

• It reads your own HP, not the target's.
• It is additive with the other damage dealt bonuses, so stacking several of them gives less than each one promises on its own.

How it interacts with other effects

• It pools with Heavy Plumb, Challenge, Crumble and Sinking in the same additive bracket.

Read out of the game binary of build 24354931. AFFECTER_DeathThroesInscription.Passive_DeathThroesInscription.OnDamage@0x932374