Helion Tree

The Helion Tree, the tree that worships the One Above, absorbs the suns rays through a similar phenomenon to photosynthesis, but the tree amplifies the qualities of light, distilling it into its sap. Its sap may be drank as a potion, but must be distilled by another liquid lest it burn the throat.

When imbibed the Helion Sap will make the user burn with the light of the sun. Fiends don't like that.