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

Cautious Slug
Common item (white)
When you are out of combat, you heal faster (+3 health per second). Each extra slug adds 3 more.
Game text: «Increases base health regeneration by +3 hp/s (+3 hp/s per stack) while outside of combat.»
Stacking: Each copy adds the same, no cap.
Watch out: What matters is not taking damage, not stopping your attacks (the game says «out of combat», which is wrong).
| 1 copy | 2 copies | 3 copies | 5 copies | 10 copies |
|---|---|---|---|---|
| 3 /s | 6 /s | 9 /s | 15 /s | 30 /s |
Each copy adds the same.
doubles the regeneration.
she fights at range and gets hit little: the slug is almost always on.
Drops from small chests, white printers and almost anything that gives items.
Unlocked from the start: it can show up in any run.
When you are out of combat, you heal faster (+3 health per second). Each extra slug adds 3 more.
Stacking: Each copy adds the same, no cap.Watch out: What matters is not taking damage, not stopping your attacks (the game says «out of combat», which is wrong).
Drops from small chests, white printers and almost anything that gives items. 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).