وَإِذَا الْمَنِيَّةُ أَنْشَبَتْ أَظْفَارَهَا
When death sinks in its claws.
Death is imagined as a predator, the predator itself is omitted, and its claws function as an associated clue. The wording dramatizes mortality as an overpowering physical grip.
A constructed revision such as “when death arrives” gives a less visual report. It loses the suggestion of claws, seizure, and terror. Plainness is not automatically rhetorical superiority.