冰霜之刃：砍一下冻一下

 fx-frostblade

local FrostBlade = {}
local KEY = { ICE_PER_HIT = 1, SLOW_PER = 20 }

local iceStacks = {}

function FB.OnAttackHit(self_, target)
    iceStacks[target] = math.min(5, (iceStacks[target] or 0) + KEY.ICE_PER_HIT)
    local stacks = iceStacks[target]
    SL:PlayBurst(SL:GetValue("actorX", target),
                 SL:GetValue("actorY", target) - 58, "ice_crystal", 6)
    SL:ShowTipAbove(target, "冰 +" .. stacks)
    -- 减速百分比: 每层 20%
    local slowPct = math.min(100, stacks * KEY.SLOW_PER)
    SL:SetSlow(target, slowPct)
    -- 冰层满: 完全冻结
    if stacks >= 5 then
        SL:FreezeActor(target, 1.5)
        SL:ShowTipAbove(target, "完全冻结!")
        SL:PlayFxAt("full_freeze", SL:GetValue("actorX", target),
                                   SL:GetValue("actorY", target))
    end
end

-- 冰层衰减: 停止攻击三秒后开始消融
function FB.Thaw(dt)
    if SL:GetValue("timeSinceLastHit") > 3 then
        for target, stacks in pairs(iceStacks) do
            iceStacks[target] = stacks - 1
            if iceStacks[target] <= 0 then
                iceStacks[target] = nil
                SL:SetSlow(target, 0)
            end
        end
    end
end

return FB