while task.wait() do
    local players = game:GetService("Players")
    local replicatedStorage = game:GetService("ReplicatedStorage")
    
    local katana = players.LocalPlayer:WaitForChild("Backpack"):WaitForChild("Katana")
    local hitRemote = replicatedStorage:WaitForChild("Assets"):WaitForChild("Remotes"):WaitForChild("Hit")
    
    for _, npc in pairs(workspace.Characters:GetChildren()) do
        if npc.Name:match("^Dummy%d+$") then
            local humanoid = npc:FindFirstChild("Humanoid")
            if humanoid then
                local args = {katana, humanoid, 1}
                hitRemote:FireServer(unpack(args))
            end
        end
    end
end