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    {"skillType":1,"level":4,"upgradeCost":[1,103]},
    {"skillType":1,"level":5,"upgradeCost":[]},
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    {"skillType":2,"level":3,"upgradeCost":[1,102]},
    {"skillType":2,"level":4,"upgradeCost":[1,103]},
    {"skillType":2,"level":5,"upgradeCost":[]},
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    {"skillType":3,"level":3,"upgradeCost":[1,102]},
    {"skillType":3,"level":4,"upgradeCost":[1,103]},
    {"skillType":3,"level":5,"upgradeCost":[]}
]