What does «وقرارة الأكدار» do after the earlier stop at «شرك الردى»?

Qalb, Tashrīʿ and Luzūm Mā Lā Yalzam: Completing the Verbal Ornaments

• Replaces the first judgment with its opposite
• Invalidates the first rhyme
• Turns the verse into prose
• Adds another meaningful description to the already complete judgment