A blazon is a merism https://richardswsmith.wordpress.com/2017/12/28/the-figures-of-rhetoric-iv-merism-night-and-day-you-are-the-oneonly-you-beneath-the-moon-or-under-the-sun/ taken further with a long list of parts of the subject, usually with some strange, even bizarre, similes
From the Bible:
Behold, thou art fair, my love; behold, thou art fair; thou hast doves’ eyes within thy locks: thy hair is as a flock of goats, that appear from mount Gilead. Thy teeth are like a flock of sheep that are even shorn, which came up from the washing; whereof every one bear twins, and none is barren among them. Thy lips are like a thread of scarlet, and thy speech is comely: thy temples are like a piece of a pomegranate within thy locks. Thy neck is like the tower of David builded for an armoury, whereon there hang a thousand bucklers, all shields of mighty men. Thy two breasts are like two young roes that are twins, which feed among the lilies.
Remember that the great English translation of the Bible, the King James version, was made at the beginning of the 17th century when all the scholars would have been taught the figures of rhetoric. https://richardswsmith.wordpress.com/2017/12/22/the-figures-of-rhetoric-i-alliteration-full-five-fathom-deep-thy-father-lies/
And from Shakespeare:
Full fathom five thy father lies;
Of his bones are coral made;
Those are pearls that were his eyes;
Nothing of him that doth fade,
But doth suffer a sea-change
Into something rich and strange.