Some heavenly dao gods will boast about escaping from the hands of a certain primordial heavenly dao god, claiming they cannot be killed.
But in fact, in many cases, it is because some primordial gods are unwilling to pay the huge cost of burning eternal matter. They only burn it when extremely angry or attracted by significant interests.
The burning of eternal matter is the most powerful means of primordial gods, greatly amplifying divine abilities and mana.
Unless they are Chu Yuan, beings like the Thunder God, who fear nothing.
"To make me burn eternal matter to kill you, Greed Demon, you should die without regret. A mere heavenly dao god dares to possess so many treasures. If I don't kill you, others will."