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Lvl: 5 Buff CD: 5 sec Skill Delay: 1 sec SP: 100 Range: 7 Cast Time: 10

Reduce the Max HP of a designated enemy by 20%. If the target is in [Quicksand Vortex], an extra 20% of Max HP will be reduced. Lasts 20 seconds. Invalid for MVP/Mini

Lvl: 4 Buff CD: 5 sec Skill Delay: 1 sec SP: 100 Range: 7 Cast Time: 10

• Reduce the Max HP of a designated enemy by 16%. If the target is in [Quicksand Vortex], an extra 16% of Max HP will be reduced. Lasts 18 seconds. Invalid for MVP/Mini

Lvl: 3 Buff CD: 5 sec Skill Delay: 1 sec SP: 100 Range: 7 Cast Time: 10

• Reduce the Max HP of a designated enemy by 12%. If the target is in [Quicksand Vortex], an extra 12% of Max HP will be reduced. Lasts 16 seconds. Invalid for MVP/Mini

Lvl: 2 Buff CD: 5 sec Skill Delay: 1 sec SP: 100 Range: 7 Cast Time: 10

• Reduce the Max HP of a designated enemy by 8%. If the target is in [Quicksand Vortex], an extra 8% of Max HP will be reduced. Lasts 14 seconds. Invalid for MVP/Mini

Lvl: 1 Buff CD: 5 sec Skill Delay: 1 sec SP: 100 Range: 7 Cast Time: 10

• Reduce the Max HP of a designated enemy by 4%. If the target is in [Quicksand Vortex], an extra 4% of Max HP will be reduced. Lasts 12 seconds. Invalid for MVP/Mini

Enemy

{
  "id": 125150,
  "BuffDesc": "Reduce Max HP",
  "BuffIcon": "skillbuff_commonbuff",
  "BuffName": "Water Asphyxia",
  "BuffRate": {
    "Odds": {
      "a": 100,
      "b": 0,
      "type": 3070
    }
  },
  "BuffType": {
    "isgain": 0,
    "isdisperse": 1
  },
  "IconType": 1,
  "BuffEffect": {
    "type": "AttrChange",
    "MaxHpPer": {
      "a": 3109,
      "b": -0.04,
      "c": 0,
      "type": 8
    },
    "MaxSpPer": {
      "a": 3109,
      "b": -0.04,
      "c": 20210150,
      "d": 0,
      "type": 6500
    }
  },
  "BuffStateID": 125150
}

Enemy

{
  "id": 125151,
  "BuffName": "Water Asphyxia (Quicksand reduces)",
  "BuffRate": {
    "Odds": {
      "a": 100,
      "b": 0,
      "type": 3070
    }
  },
  "BuffType": {
    "isgain": 0,
    "isdisperse": 1
  },
  "Condition": {
    "type": "HasBuff",
    "buffid": [
      125140
    ]
  },
  "BuffEffect": {
    "type": "AttrChange",
    "MaxHpPer": {
      "a": 3109,
      "b": -0.04,
      "c": 0,
      "type": 8
    },
    "MaxSpPer": {
      "a": 3109,
      "b": -0.04,
      "c": 20210150,
      "d": 0,
      "type": 6500
    }
  }
}

Formula

{
  "CD": 5,
  "id": 3109005,
  "Buff": {
    "enemy": [
      125150,
      125151
    ]
  },
  "Cost": 1,
  "Desc": [
    {
      "id": 3109000,
      "params": [
        20,
        20,
        20
      ]
    }
  ],
  "Icon": "skill_3109001",
  "Camps": "Enemy",
  "Level": 5,
  "Logic": "SkillLockedTarget",
  "DescId": "##170386",
  "NameZh": "##159335",
  "CastAct": "reading",
  "DelayCD": 1,
  "Fire_EP": 3,
  "SE_cast": "Skill/Magic_cast",
  "ItemCost": [
    {
      "id": 12903,
      "count": 1020
    }
  ],
  "Pvp_buff": {
    "enemy": [
      125150,
      125151
    ]
  },
  "AttackAct": [
    "use_skill15"
  ],
  "Attack_EP": 3,
  "Lead_Type": {
    "CCT": 0,
    "FCT": 10,
    "type": 2
  },
  "SE_attack": "Skill/VenomDust",
  "SkillCost": {
    "sp": 100
  },
  "SkillType": "Buff",
  "Target_EP": 3,
  "Launch_Range": 7,
  "ExtraMaxLevel": 0
}

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