Masks in Soulmask play the most important role. But to use them you need to have them charged and then recharged after use.
The masks are recharged by using Sunstones that are available through looting chests at various location in the game.
There isn’t much you need to know about recharging other than getting Sunstones. So, in this guide I am going to focus more on how to get the Sunstones to recharge mask energy in Soulmask.
Once you have Sunstones in your inventory, right-click on a Sunstone to recharge your mask. Each Sunstone will fully restore the energy of a mask.

Where to Find Sunstones in Soulmask
Sunstones are located in various Ruins marked on your map. These areas are typically guarded by enemies such as beasts or humanoids.

Once you beat the enemies guarding the Ruins, you can find loot in storage chests (from humanoids) or Ancient Relics (from beasts). These containers often contain Sunstones among other types of loot.
To use a sunstone to recharge your mask, you need to open your inventory and right click on the stone.
Know that your mask will recharge itself over time, but this method is slow and don’t recommend if recharging masks is urgent.
If you are seeing “not enough energy” message on your crystals aka sunstones, don’t worry you can still use them.
All Ruin Locations
