Legendary item (red). What the game says, what it really does, what each copy adds and what it pairs with.

Shattering Justice
Legendary item (red)
Hit an enemy 5 times and you break its armour, so it takes more damage for 8 s. Each extra one, 8 s more.
Game text: «After hitting an enemy 5 times, reduce their armor by 60 for 8 (+8 per stack) seconds.»
Stacking: Each copy adds the same, no cap.
Watch out: Good on almost anyone: lowering armour raises all damage a lot.
There is no useful number: what changes per copy is under «Stacking», above.
Drops from legendary chests and, less often, from large and small chests.
Unlocked from the start: it can show up in any run.
Hit an enemy 5 times and you break its armour, so it takes more damage for 8 s. Each extra one, 8 s more.
Stacking: Each copy adds the same, no cap.Watch out: Good on almost anyone: lowering armour raises all damage a lot.
Drops from legendary chests and, less often, from large and small chests. Unlocked from the start: it can show up in any run.
Sources: the game's English text (name and description), the Risk of Rain 2 wiki (riskofrain2.wiki.gg: this item's page, read on 31 October 2026; numbers, stacking formula and notes) and the wiki's survivor pages. The plain-words text and the synergies are ours. Icons: Risk of Rain 2 (Hopoo Games / Gearbox).