{
  "longfooted": {
    "max_level": 5,
    "min_cost": 12,
    "step_cost": 12,
    "bonus_per_level": 1.0
  },
  "acrobat_chest": {
    "max_level": 10,
    "min_cost": 15,
    "step_cost": 14,
    "bonus_per_level": 0.1
  },
  "acrobat_legs": {
    "max_level": 10,
    "min_cost": 15,
    "step_cost": 14,
    "bonus_per_level": 0.1
  },
  "multi_roll": {
    "max_level": 4,
    "min_cost": 15,
    "step_cost": 17,
    "bonus_per_level": 1.0
  }
}