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Sacred clay is a material used to create Sacred clay armour and Sacred clay weapons. It is obtained by using Clay on an altar (granting 20 crafting experience) and then using the sacred clay on an anvil to make the equipment. These various armours scale with your level, their stats will upgrade once you reach a certain level. The armour stats change on levels 10, 20, 30 and 40. The armours scale with your defence level, and the weapons scale with your attack, range and magic level.