Complex sentence: But while in Dul Guldur, he encountered the spirit of the Witch King of Angmar as well as the shadow of the Necromancer himself, but he escapes with the Morgul blade he took from Angmar.
Split into simpler sentences: But while in Dul Guldur, he encountered the spirit of the Witch King of Angmar as well as the shadow of the Necromancer himself. But he escapes with the Morgul blade he took from Angmar.