| “ | A congealed glob of Leech Blood. Can be used for medicinal purposes when carefully prepared. | ” |
— In-game Description
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Leech Blood is a resource used in antidotes. Leech Blood is obtain from harvesting the Leech by using the Stone or Metal Pick, the Stone or Metal Hatchet, or carnivores. The most effective way being the Metal Hatchet, with the Diseased Leech yielding the most. Leech Blood is used as an ingredient to craft the Lesser Antidote in the Mortar and Pestle or Chemistry Bench.