Aura

function isSpawned(player)
   if workspace:FindFirstChild(player.Name) and player.Character:FindFirstChild("HumanoidRootPart") then
       return true
   else
       return false
   end
end

while wait() do
   for i, v in pairs(game.Players:GetPlayers()) do
       if isSpawned(v) and v ~= game.Players.LocalPlayer and not v.Character.Head:FindFirstChild("UnoReverseCard") then
           if (v.Character.HumanoidRootPart.Position - game.Players.LocalPlayer.Character.HumanoidRootPart.Position).Magnitude <= 50 then
               game:GetService("ReplicatedStorage").b:FireServer(v.Character["Right Arm"])
               wait(0.1)
           end
       end
   end
end