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When killed, the Naga drops Naga Scales and the Naga trophy, and unlocks the Lich Tower. Nagas attack by lunging at the player, which is telegraphed by the Naga stopping briefly. They are a large snake, and as a Naga loses health it becomes shorter. Nagas are the easiest and most simple of the bosses. Nagas are found in Naga Courts in the Twilight Forest, Dense Twilight Forest, Twilight Clearing, Oak Savanna, Mushroom Forest, and Firefly Forest biomes. The Final Castle is mostly un-implemented, so the Lamp of Cinders is the last progress-based Twilight Forest item. The Lamp of Cinders in the Giant Obsidian vault allows the player to burn through the Thorns outside the Final Castle. Killing the Giants yields a Giant's Pickaxe, which can be used to break into the Giant Obsidian vault. Magic Beans found in the Obsidian vaults can be planted in Uberous Soil, which creates a Beanstalk that allows the player to access the Giants' Clouds, but the Clouds can be built up to normally as well.
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Under the Giants' Clouds are Troll Caves, in which Obsidian vaults can be found. After the Snow Queen, Ur-Ghast, and Hydra are defeated, the player can access the Twilight Highlands. The Yeti unlocks the Snow Queen, the Phantom Knights unlock the Ur-Ghast, and the Minoshroom unlocks the Hydra. Areas the player is not able to access are marked by having yellow square particles, or damage the player in various ways upon entering. The Twilight Forest has many bosses, and there is a pretty specific order that the bosses must be killed. A flow chart of the Twilight Forest progression system
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