Obi Weaponskill

function job_post_precast(spell, action, spellMap, eventArgs)
    if spell.type == 'WeaponSkill' then
        if is_sc_element_today(spell) or is_sc_element_weather(spell) then
            equip({waist='Hachirin-no-Obi'})
        end
    end
end

-- Add the following down at the bottom of your main lua.
function is_sc_element_today(spell)
    local weaponskill_elements = S{}:
        union(skillchain_elements[spell.skillchain_a]):
        union(skillchain_elements[spell.skillchain_b]):
        union(skillchain_elements[spell.skillchain_c])

    if weaponskill_elements:contains(world.day_element) then
        return true
    else
        return false
    end
end

function is_sc_element_weather(spell)
    local weaponskill_elements = S{}:
        union(skillchain_elements[spell.skillchain_a]):
        union(skillchain_elements[spell.skillchain_b]):
        union(skillchain_elements[spell.skillchain_c])

    if weaponskill_elements:contains(world.weather_element) then
        return true
    else
        return false
    end
end