DotA Puzzle™: Phantom N'aix

The creators of Toss™, Forceflow and iminyourhat, bring you a new series: DotA Puzzle™. DotA knowledge will be tested in applicable situations within set up games (All situations will be recreatable within a normal game). Post your answers and ideas on how this was achieved as comments to the video. N'aix did NOT: Use Boots of Travel, Windwalk, run through river, or use any runes. Mode was -ap, -du was not used and therefore there was only one N'aix, who both started and ended the fight. None of the heroes were illusions. Assume all other options are possible, there must be more ways to do this than just one, though we will reveal the replay of what we actually did later. Help from: FFs.CallMissinG of Clan WotE.