Ezekiel 28:12 describes his original perfection as seal of perfection, confirming the blameless state here.

Ezekiel 28:17 explains that pride over beauty caused the fall from the blameless state described here.

Ezekiel 28:18 details the specific sins (dishonest trade) that followed the wickedness found in him.

In Ezekiel 28:7, the judgment on the king of Tyre follows directly from his blamelessness turned to sin described here. Sequential cause-effect.

Ezekiel 28:13 describes the king's original perfection in Eden, the state before unrighteousness was found in him.

In Ecclesiastes 7:29, God made mankind upright but they sought schemes — the exact pattern of blamelessness then deviation.

In Isaiah 14:12, the morning star's fall from heaven mirrors this fall from blamelessness — both depict a dramatic descent.

In 2 Peter 2:4, angels who sinned were judged — the same pattern of fall from blamelessness to condemnation here.