On this page of the Valheim guide, you will learn how to obtain Freeze gland, a useful crafting resource.
Freeze gland is one of the resources that can be obtained while exploring the vast world of Valheim. The freezing gland is used to make Frost arrows - requires a level 4 workbench.
Freeze glands are obtained by defeating Drakes - enemies that can be found in the Mountains biome. Drakes are powerful creatures that can use their icy breath to inflict a negative Frost effect and severely slow you down. A good tactic for dealing with this opponent is to use a bow and avoid their frost breath.