The Abyssal Harpoon is a unique weapon in Valheim that falls into the spear family of weapons but is capable of pulling enemies toward you. It’s mostly used to reel in fleeing enemies, but can also be used to send players into orbit and other shenanigans.
You cannot upgrade the abyssal harpoon.
Abyssal Harpoon Usage
The harpoon deals very little damage and only useful for reeling in targets.
When reeling in a target, you will slowly consume stamina and can change to a different weapon. When the harpooned target gets too close, dies, or you run out of stamina, it will be released.
Abyssal Harpoon Statblock