local Players = game:GetService("Players")
local LP = Players.LocalPlayer
local S = 5

local function apply(char)
    local hb = char:FindFirstChild("HeadHitbox")
    if hb then
        hb.Size *= S
        hb.Transparency = 0.5
        hb.CanCollide = false
    end
end

local function hook(p)
    if p == LP then return end
    if p.Character then apply(p.Character) end
    p.CharacterAdded:Connect(function(c) task.wait(1); apply(c) end)
end

for _, p in ipairs(Players:GetPlayers()) do hook(p) end
Players.PlayerAdded:Connect(hook)