Green Herb

The Green Herb, listed on the wiki as the Herb of Viridis, is a healing plant locked away in The Infirmary of The Hotel. It sits behind a Skull Lock door that only a Skeleton Key opens, in a small room with a typewriter and papers scattered around, a layout that the wiki links to a Resident Evil reference. It arrived with the Hotel+ Update.

What it gives

Interacting with it grants an immediate 25 HP and a passive effect, shown by a bright green leaf above the health bar, that regenerates 5 HP every time the player opens a door. The herb is not consumed, so it can be used once per player in the run rather than once in total. The effect lasts for the entire run or until death by an entity.

Details that matter

Revives do not bring the effect back, but rebirthing with a Lotus Flower keeps it. It also carries into other floors with the same regeneration. Before The Mines update it healed 2 HP per second; the rework to 5 HP per door came afterward. The leaf icon stays even at full health.

Other notes

The achievement Herb of Viridis is awarded for finding and using the herb. Viridis means green in Latin.