On a new adventure Peaks of Time ALL of your heroes will lose health and energy after every battle. To restore health, you will need to find the "Waterhole".
For this quest, I highly recommend taking any healer, especially Nemora. If during each battle you can completely heal, then you do not need any watering places.
Notes:
The path to the artifact
This guide is only about how to get the artifact faster. The rest of the treasures are easy enough to find.
Follow the route northwest of the pointed barricade.
Walk north until you reach a triangle of stones.
Go west - you are almost there.
Stand on a blue area on the ground to lower the blue sun and reveal a secret path behind it.
But before picking up the treasure, a boss battle awaits you
Enjoy your shiny new artifact!