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Crafting 1 Ancient Skull Belt Magical Ancient Human Skull
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Rope (Constitution: +1(HL1) / +2 HL17), Earth Resistance: +5%(HL1) / +10%(HL6) / +15%(HL11) / +20%(HL16) / +25%(HL21)) Belts

This is from the guide. Crafting this belt should say Intelligence +1 / +2. Otherwise its correct.