What does the phrase “the King” refer to？

Read the quoted parts carefully and answer the questions in English. I heard a Fly buzz—when I died—
The Stillness in the Room
Was like the Stillness in the Air—
Between the Heavens of the storm—

The Eyes around—had wrung them dry—
And Breaths were gathering firm
For that last Onset—when the king
Be witnessed—in the Room—

What does the phrase “the King” refer to？
【正确答案】：

THE GOD OF DEATH.

【题目解析】：该选段主要是描写死亡的时刻，所以这里的“the King”指的是死神——The God of death。