Skull and Shackles
Aura moderate transmutation; CL 9th
Slot none; Price 10,305 gp; Weight 16 lbs.
This +1 returning harpoon (Pirates of the Inner Sea 18) is made from the jagged, scrimshaw-carved tusk of a narwhal attached to a 50-foot length of woven sinew. Unlike most thrown weapons, a vindictive harpoon functions as well underwater as on land, and its wielder takes no penalties on attack rolls underwater.
Works both as a ranged and melee weapon.
You found this magic item used against you by the Brinebrood Queen, the vicious, deranged grindylow matriarch.
It is now yours by right of conquest.