i cant seem to find out why the if is false, can someone help me here?

have a look I don't know where the problem is here

sp = script.Parent
debounce=true
function burn(hit)
	if hit and hit.Parent and hit.Parent.Name ~= "Part" and hit.Name ~= "Handle" and hit.Name ~= "fire" and debounce then
		debounce=false
		Humanoid=hit.Parent:FindFirstChild("Humanoid")
        if Humanoid then	
		    Humanoid:TakeDamage(20)
		    fire = sp:FindFirstChild("fire")
			if fire then
				fire.Enabled=false
			end
			sp.Anchored=true
			wait(2)
			sp:Destory()
		end
	end
end

sp.Touched:connect(burn)

this is the script from the "hoe to code your dragon" thing.

At line 15 you typed wrong "Destroy()"