Complex sentence: Ren charges at Luke in hand-to-hand combat, seemingly bisecting him with his lightsaber, but Luke remains unscathed; still on Ahch-To, Luke has sent a projection of himself to Crait using the Force.
Split into simpler sentences: Ren charges at Luke in hand-to-hand combat, seemingly bisecting him with his lightsaber, but Luke remains unscathed. Still on Ahch-To, Luke has sent a projection of himself to Crait using the Force.