Inscription of the Storm

Every hostile in a circle of radius 2 around the target takes a hit of 30 percent of the wearer's physical attack power.

Where it lands: Each proc is its own execution built from a self coefficient on physical attack power. Its attack type resolves to none, so the hit check short-circuits and the proc always lands, but it still rolls its own critical and can be guarded.

When it runs: After the basic attack has landed, and only when it was a critical hit.

What it applies to: Basic attacks only, and only on a critical result.

Worked numbers

Per victim, before that victim's own resistance.

Rule of thumb: Every 10 physical attack power is 3 damage to each victim in the circle.

Things the tooltip does not tell you

• The coefficient stat is hardcoded to physical attack power. A magic basic attack still procs Storm off physical attack power, and only the damage type is inherited, so the resistance the victim uses follows the attack while the scaling does not.
• The victim cap could not be settled from the binary. The loop's own predicate publishes up to 7 hits while the table value and the design note both say 5. The wiki reports the predicate and flags the reading as unconfirmed in game.
• Whether the primary target itself eats a Storm hit was not proven from the binary. The design note says it does.

How it interacts with other effects

• Sinking does nothing for Storm. The proc is a fresh execution scaled off physical attack power, and Sinking's bonus is scoped to the execution that produced the base hit.

Read out of the game binary of build 24354931. AFFECTER_StormInscription.Passive_StormInscription.OnDamage@0x928748, AFFECTER_StormInscription.Passive_StormInscription.<Attack>d__3.MoveNext@0x928BAC