Rest is a costed action
Rest can refresh an Explore hand and resources, but it can also cost health when room danger is active. Current sources agree that Warmth can reduce that danger; they do not establish a permanent numeric formula for every build.
Before you rest
1. Read the displayed rest cost and check your remaining health. 2. Use useful low-cost Explore actions first, especially an action that reveals a new interaction or creates Warmth. 3. Decide whether the next hand has a concrete goal: an exit, a route tool, a station, or a solution to the current obstacle. 4. Accept a small cost only when that goal is worth the health shared with the next combat encounter.
Do not confuse stored Gloom, room danger, and Warmth just because the words appear near one another. Inspect the current card or structure text.
Source and version note
This page cross-checks the dedicated Warmth/Threat guide on shroomandgloom.site with shroomgloom.org's Rest, Warmth & Gloom page and the Explore advice on shroomandgloom.wiki.