In fact, logically speaking,
this attack should not be considered a full-power strike from a fifth-layer Divinity Transformation Cultivator. After all, Divinity Transformation Cultivators have many techniques at their disposal, such as the most famous "Domain". Once a Divinity Transformation Domain is invoked, there wouldn't be so much laughing and joking around.
The Self-Destruction Term is a full-power strike that crosses a Great Realm. It utilizes the higher concentration and potency of Spiritual Energy from a higher realm and fully stimulates a spell to crush the enemy.
To say it is a full-power strike is not incorrect.
After all, if a fifth-layer Divinity Transformation Cultivator, without resorting to special methods such as Domain, relies solely on their vast and dense Spiritual Energy and current potency, that indeed would be their strongest strike.
However, in actual combat, it is not considered so.
But even so!