How to add kill effect in sword?

Hello! The idea is when you kill somebody with linked sword the script checks humanoid's health and if its under 0 the kill effect occurs. I know how to make it with classic ROBLOX sword, but sword I'm using is scripted differently and I just cant understand it. Can somebody pls help me!!

Swords damage function:

local function IsAlive(Plr)
    local Humanoid = Plr.Character:FindFirstChild("Humanoid")

    return (Humanoid and Humanoid.Health > 0)
end

local function onTouched(Hit)   
    local Other = Hit.Parent:FindFirstChild("Humanoid")
    if Other then
        local Arm = Tool.Parent:FindFirstChild("Right Arm")
        if Arm then
            local Grip = Arm:FindFirstChild("RightGrip")
            if (Grip and (Grip.Part0 == Arm or Grip.Part1 == Sword)) then
                local O_Player = Players:GetPlayerFromCharacter(Hit.Parent) 
                if O_Player then
                    local S_Player = Players:GetPlayerFromCharacter(Tool.Parent)
                    if (IsAlive(S_Player)) then
                        if (S_Player) then
                            TagHumanoid(S_Player, Other)                        
                        end
                    end
                else
                    Other:TakeDamage(damage)
                end
            end
        end
    end
end

Kill effect:

    if character:FindFirstChild("Humanoid").Health <= 0 then

    end