From Dark and Darker Wiki

Consumable

Name Movement Speed Effect Interaction Time Action Movement Penalty
-20Provides 15 | 19 | 24 | 30 | 37 | 45 | 54 recoverable base healing. 4 s
50% Scaling
Consume
Always: 50%

Opens the Frozen Iron Door. This door can only be found in Ice Abyss, in the Charnel House module.
Opens the Golden Door. This door can be found in various modules of the Crypts maps, specifically: the Treasure Room, the Armory, and the Wheel.
Opens locked doors and chests. Will not work on doors that require special keys.
Opens the Goblin Stone Door. This door can only be found in Goblin Caves, in the Goblin Rooms module.
Opens the Rusty Iron Door. This door can only be found in Ruins.
Opens the Skull Door. This door can only be found on the Inferno map that features Ghost King, in the Demon Gate module.
-20Provides 100% percent max health healing. 15 | 13 | 11 | 9 | 7 | 5 | 3 s
50% Scaling
Consume
Always: 50%

Allows the player to disable environmental traps.