Hushang's Stone Strikes Fire

From A2.2, The Founding of the Feast of Sadeh. It illustrates A2.2.2–7:

A2.2.2
From far he saw a long black shape appear,Dark-bodied, swift, and drawing quickly near.
A2.2.3
Its eyes were like two springs of flowing blood,While smoke poured from its mouth in choking flood.
A2.2.4
He seized a stone and hurled it, swift and true,A kingly cast that split the dusk in two.
A2.2.5
The monstrous worm escaped the flying blow;The stone struck rock and cast a fiery glow.
A2.2.6
From shattered flint the leaping sparks broke through,And from that seed the earliest fire grew.
A2.2.7
Thus stone on stone awoke the sleeping spark,And light leapt out and split the ancient dark.