The piece falls right through the vacuum, and right through the magnetic shields like they aren't. Even. There. Obi-Wan gets a very sudden, very bad feeling-- almost a real precognition, and he lets it roll through him, because it might be the only real warning they have that will let them survive this, because it's bad--

--moss, or something like it, vividly green, eating away at the deck and sides of the hangar bay--

--a chittering like insects--

--the vast, indomitable cityscape of Coruscant overrun with green, and fluttering, iridescent wings--

--he has his lightsaber in his hand in the next breath, reaching mentally for Anakin, for their easy synchronisation--