Subject compared: the tall, conspicuous view of al-Yamāmah.
Vehicle: unsheathed swords raised in sword-bearers’ hands.
Comparative marker: the prefix ka- in ka-asyāfin.
Shared visual feature: an upright, pointed, conspicuous outline.
The simile selects the visual profile of a drawn sword, not necessarily an act of combat. Bi-aydī muṣlitīnā completes and sharpens the image.