how do i make something kill humanoids?

i want to make a obby so i was making the lava jumps part but i dont know how to make the lava kill humanoids. like if a humanoid touches the block then the lava will break the humanoids joints. note:this is my first time asking so u might not understand my question.

Hello there.

The easiest way of doing it would be the following.

Put the script inside the parts.

There are more ways, but this is the easiest one.

--Variables--
local Brick = script.Parent
--End--

--Code--
local function PlayerTouched(Part) --The function to be fired
	local Parent = Part.Parent --Finding the Player
	if game.Players:GetPlayerFromCharacter(Parent) then --Checking if the part is actually a player in the server.
		Parent.Humanoid.Health = 0 -- Setting the health of the player to 0, which kills them.
	end
end

Brick.Touched:connect(PlayerTouched) --This fires the function when a player touches the part