"code a sword slash ability"

```lua
-- local script for sword slash ability 
local tool = script.Parent
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local debounce = false

local function onActivated()
    if debounce then return end
    debounce = true
    
    -- Perform slash animation
    local animation = Instance.new("Animation")
    animation.AnimationId = "rbxassetid://SlashAnimationId" -- Replace with actual animation asset id
    local animTrack = player.Character.Humanoid:LoadAnimation(animation)
    animTrack:Play()
    
    -- Detect if the slash hits any targets
    local hitBox = tool:WaitForChild("HitBox") -- Assuming there's a part named HitBox within the tool
    local connection
    connection = hitBox.Touched:Connect(function(hit)
        local hitCharacter = hit.Parent
        local humanoid = hitCharacter:FindFirstChildWhichIsA("Humanoid")
        if humanoid and hitCharacter ~= player.Character then
            -- Apply damage or effect to the humanoid
            humanoid.Health = humanoid.Health - 25 -- Example damage
        end
    end)
    
    -- Wait for the animation to finish before disconnecting the Touched event
    animTrack.Stopped:Wait()
    connection:Disconnect()
    
    debounce = false
end

tool.Activated:Connect(onActivated)
```