A modified version of the Binder library from Quenty's Nevermore engine.

A key feature of this version of Binder is ancestry filtering. ROBLOX instances binded under a Binder are observed within a specific ancestor(s). Take a look at the following code:

local binderConfig = {
     TagName = "Lava",
     Ancestors = { workspace },
}

local function constructor(lava: BasePart)
     local touchedConnection: RBXScriptConnection

     touchedConnection = lava.Touched:Connect(function(hit: BasePart)
         local character = hit:FindFirstAncestorOfClass("Model")

         if not character then
              return
         end

         local humanoid = character:FindFirstChildOfClass("Humanoid")

         if not humanoid or humanoid.Health <= 0 then
              return
         end

         humanoid:TakeDamage(100)
     end)

     return function()
       if touchedConnection.Connected then
            touchedConnection:Disconnect()
       end
     end
end

local binder = Binder.new(binderConfig, constructor)
binder:Start()

(This Lava binder only observes its instances as long as they're in game.Workspace)