Inscription of the Heavy Plumb

Bonus = carried Weight x 15 x 0.01, which is 0.15 percentage points of Damage Dealt Bonus per point of Weight.

Where it lands: The bonus is written into the Damage Dealt Bonus of that one hit. A hit is (fixed + self coefficient + target coefficient) x (1 + multiplier + Damage Dealt Bonus / 100 + typed damage bonus / 100 + target damage taken / 100) x hit result x 100 / (100 + resistance) x final multiplier. Heavy Plumb lands inside the additive bonus bracket, and that whole bracket is then multiplied by the critical multiplier, before defense is applied.

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

What it applies to: The gate is the skill row's hit type and damage type, not the words basic attack. 96 of the 252 skills in the table are melee physical and every one of them gets the bonus. Ranged physical (9 skills), ranged magic (35) and melee magic (3) get nothing.

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 points of carried Weight is +1.5 percent damage.

Things the tooltip does not tell you

• Weight is the summed table weight of everything the unit carries, equipped gear included. A naked unit with an empty bag has Weight 0 and the inscription does nothing.
• It reads current Weight, not the carrying limit. The limit (100 + 4 x Strength) only caps how far this can go: at 200 carried weight the bonus is +30 percent, and the code applies no cap of its own.
• The bonus is additive with every other damage dealt bonus in the same bracket, so each extra source is worth less than the first one.

How it interacts with other effects

• It shares the additive damage dealt bracket with Challenge, Death Throes, Crumble and Sinking, so none of those multiply each other.

Read out of the game binary of build 24354931. AFFECTER_HeavyPlumbInscription.Passive_HeavyPlumb.HeavyPlumbAddStatus@0x933A2C, Refactor.Component.StatusComponent.ApplyInventoryWeight@0xD563A0, Refactor.Combat.DamageSimulator.CalculateValue@0x8FC248