Attack Aura

local Players = game:GetService("Players")
local LocalPlayer = Players.LocalPlayer
local Character = LocalPlayer.Character or LocalPlayer.CharacterAdded:Wait()
local UserInputService = game:GetService("UserInputService")
local RunService = game:GetService("RunService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Toggle = false

local function GetPart(Model)
    if Model and Model.ClassName == "Model" then
        if Model.PrimaryPart then
            return Model.PrimaryPart
        elseif Model:FindFirstChild("Totem") then
            return Model:FindFirstChild("Totem")
        elseif Model:FindFirstChildWhichIsA("Part") then
            return Model:FindFirstChildWhichIsA("Part")
        elseif Model:FindFirstChildWhichIsA("BasePart") then
            return Model:FindFirstChildWhichIsA("BasePart")
        end
    end
    return nil
end

UserInputService.InputBegan:Connect(function(Input, GameProcessed)
	if GameProcessed then return end
	if Input.KeyCode == Enum.KeyCode.R then
		Toggle = not Toggle
	end
end)

RunService.RenderStepped:Connect(function()
    Character = LocalPlayer.Character or LocalPlayer.CharacterAdded:Wait()
    if Toggle and Character and Character:FindFirstChild("HumanoidRootPart") then
        local Closest
        local ClosestDistance = 12.5
        for _,v in workspace:GetChildren() do
            local Part = GetPart(v)
            if Part and Character and v ~= Character and (Character.HumanoidRootPart.Position - Part.Position).Magnitude < ClosestDistance and v:FindFirstChild("Health") then
                Closest = Part
                ClosestDistance = (Character.HumanoidRootPart.Position - Part.Position).Magnitude
            end
        end
        for _,v in workspace.Critters:GetChildren() do
            local Part = GetPart(v)
            if Part and Character and (Character.HumanoidRootPart.Position - Part.Position).Magnitude < ClosestDistance and v:FindFirstChild("Health") then
                Closest = Part
                ClosestDistance = (Character.HumanoidRootPart.Position - Part.Position).Magnitude
            end
        end
        if Closest then
            ReplicatedStorage.Events.SwingTool:FireServer(os.clock(),{Closest})
        end
    end
end)