Craft a spear with | stick | stick | (material) |, also mirrored.
Spears can be thrown using right mouse button, they either hurt someone or stick where they land on. Damage depends on speed and material, flight trajectory is ballistic with drag.
Spears can be used to fight, but are slower and weaker than swords.
Spears can be used to dig, but are slower and weaker and pickaxes.