Harpoon
Harpoons are long-ranged throwing weapons, similar to Tridents, that track flying targets and deal increased damage the longer a target has been in the air making them very powerful for fighting Phantoms and Elytra-wearing players. Harpoons have innate Loyalty, returning to the user after hitting the ground or a target. In addition to being thrown, Harpoons can be used in melee, dealing 7 damage and having 1.3 attack speed.
Harpoons can be found as treasure in Nether Fortress and Bastion Bridge chests.