each weapon has 5 slots, 2.9k weapon gives u 5 empty slots, so then u can add any runestones u like. 11k weapon also gives u 5 slots, but it's already filled with 3 runestones, so then u can only add 2 of ur own choice...
armor just boost attack n defence of that type of element...which is pointless to get...since skills are better ^^
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