damage amplifier

-- // credits: me
-- // custom ui modded from walkspeed template to change classic sword values

local p = game.Players.LocalPlayer
local bp = p:WaitForChild("Backpack")
local char = p.Character or p.CharacterAdded:Wait()

local mult = 1000 -- default box value
local on = true

-- ui creation stuff (made it match the black/gray layout)
local gui = Instance.new("ScreenGui")
gui.Name = "cool_amp_gui"
gui.ResetOnSpawn = false
gui.Parent = p:WaitForChild("PlayerGui")

local frame = Instance.new("Frame")
frame.Size = UDim2.new(0, 220, 0, 160)
frame.Position = UDim2.new(0.4, 0, 0.4, 0)
frame.BackgroundColor3 = Color3.fromRGB(30, 30, 30)
frame.BorderSizePixel = 0
frame.Active = true
frame.Draggable = true 
frame.Parent = gui

local title = Instance.new("TextLabel")
title.Size = UDim2.new(0, 140, 0, 30)
title.Position = UDim2.new(0, 10, 0, 0)
title.BackgroundTransparency = 1
title.Text = "Damage Amplifier"
title.TextColor3 = Color3.fromRGB(255, 255, 255)
title.TextSize = 14
title.Font = Enum.Font.SourceSansBold
title.TextXAlignment = Enum.TextXAlignment.Left
title.Parent = frame

local x_btn = Instance.new("TextButton")
x_btn.Size = UDim2.new(0, 30, 0, 30)
x_btn.Position = UDim2.new(1, -30, 0, 0)
x_btn.BackgroundColor3 = Color3.fromRGB(50, 50, 50)
x_btn.Text = "X"
x_btn.TextColor3 = Color3.fromRGB(255, 255, 255)
x_btn.Font = Enum.Font.SourceSansBold
x_btn.Parent = frame

local min_btn = Instance.new("TextButton")
min_btn.Size = UDim2.new(0, 30, 0, 30)
min_btn.Position = UDim2.new(1, -65, 0, 0)
min_btn.BackgroundColor3 = Color3.fromRGB(50, 50, 50)
min_btn.Text = "-"
min_btn.TextColor3 = Color3.fromRGB(255, 255, 255)
min_btn.Font = Enum.Font.SourceSansBold
min_btn.Parent = frame

local content = Instance.new("Frame")
content.Size = UDim2.new(1, 0, 1, -30)
content.Position = UDim2.new(0, 0, 0, 30)
content.BackgroundTransparency = 1
content.Parent = frame

local toggleBtn = Instance.new("TextButton")
toggleBtn.Size = UDim2.new(0, 200, 0, 35)
toggleBtn.Position = UDim2.new(0, 10, 0, 10)
toggleBtn.BackgroundColor3 = Color3.fromRGB(40, 40, 40)
toggleBtn.Text = "Disable"
toggleBtn.TextColor3 = Color3.fromRGB(255, 255, 255)
toggleBtn.Font = Enum.Font.SourceSansBold
toggleBtn.Parent = content

local lbl = Instance.new("TextLabel")
lbl.Size = UDim2.new(0, 200, 0, 20)
lbl.Position = UDim2.new(0, 10, 0, 55)
lbl.BackgroundTransparency = 1
lbl.Text = "Set Multiplier (1-10000):"
lbl.TextColor3 = Color3.fromRGB(200, 200, 200)
lbl.TextSize = 12
lbl.Parent = content

local box = Instance.new("TextBox")
box.Size = UDim2.new(0, 200, 0, 30)
box.Position = UDim2.new(0, 10, 0, 80)
box.BackgroundColor3 = Color3.fromRGB(40, 40, 40)
box.Text = "1000"
box.TextColor3 = Color3.fromRGB(255, 255, 255)
box.Font = Enum.Font.Code
box.Parent = content

-- // clicks and stuff
x_btn.MouseButton1Click:Connect(function()
    gui:Destroy()
end)

min_btn.MouseButton1Click:Connect(function()
    content.Visible = not content.Visible
    frame.Size = content.Visible and UDim2.new(0, 220, 0, 160) or UDim2.new(0, 220, 0, 30)
end)

toggleBtn.MouseButton1Click:Connect(function()
    on = not on
    toggleBtn.Text = on and "Disable" or "Enable"
    toggleBtn.BackgroundColor3 = on and Color3.fromRGB(40, 40, 40) or Color3.fromRGB(70, 35, 35)
end)

box.FocusLost:Connect(function()
    local n = tonumber(box.Text)
    if n then
        mult = math.clamp(n, 1, 10000)
        box.Text = tostring(mult)
    else
        box.Text = tostring(mult) -- put old value back if they typed letters
    end
end)

-- // continuous tool monitoring loop
task.spawn(function()
    while true do
        task.wait(0.3) -- slightly faster check speed
        if on then
            -- loop through inventory
            for _, v in ipairs(bp:GetChildren()) do
                if v:IsA("Tool") and (v:FindFirstChild("SwordScript") or v:FindFirstChild("Slash")) then
                    local d = v:FindFirstChild("Damage") or v:FindFirstChild("BaseDamage")
                    if d then d.Value = mult end
                end
            end
            -- loop through held weapon
            local h = char:FindFirstChildOfClass("Tool")
            if h and (h:FindFirstChild("SwordScript") or h:FindFirstChild("Slash")) then
                local d = h:FindFirstChild("Damage") or h:FindFirstChild("BaseDamage")
                if d then d.Value = mult end
            end
        end
    end
end)

print("Gui successfully injected.")