The Obsidian Spear is a craftable Weapon exclusive to the Shipwrecked DLC. It can be crafted using 1 Spear, 3 Obsidian, and 1 Dragoon Heart, however doing so requires an Obsidian Workbench or a Brain of Thought. Both the Obsidian Spear and its Blueprint are possible rewards from X Marks the Spot treasure chests.
Initially, the Obsidian Spear deals the same damage as a Tentacle Spike per hit, but as the Obsidian Spear is used to attack, it will become charged causing it to deal up to 2x damage when fully charged. It takes approximately 30 hits to reach full charge. As the charge level increases, the Obsidian Spear will also produce more heat and light, which protects the players from Charlie, but can cause Overheating. If dropped into water while sailing, the Obisidian Spear will lose all of its charge. It should be noted that it has a very high durability, 2.5x that of the regular Spear.
- The Obsidian Spear, along with the Obsidian Axe and Obsidian Machete, will still gain charges when used in Winter.
- As the weapon gains charges, the heat and light that it provides makes it an effective weapon to use during the long and cold winter nights. However, since it requires an attackable target to be charged, it may be preferable to carry around an Obsidian Axe and cut down Trees instead.
- The weapon can be charged safely by attacking passive Creatures that can regenerate health such as Chester or Packim Baggims. However, the high damage of the weapon combined with the relatively low health and slow regeneration of the companions makes this process impractical. However, a more practical method is attacking a Lureplant and replanting the Fleshy Bulb when it dies, this way the weapons can be charged with little to no risk.
- This weapon can be used to fight mobs that cannot be ignited, such as Dragonflies, Frogs and Depths Worms.