Chaos emperor, the dragon of Armageddon rulling question

[s.nickid]

It is a pendulum monster, and when he is on the field as a face up monster, he got an unclassified effect, that if he leaves the field while face-up, he goes to the bottom of my deck, and the rulling state it also works during the damage step, so would he still be sent to the bottom of my deck even after being destroy by battle? https://yugipedia.com/wiki/Card_Rulings ... Armageddon

I would prefer a judge to answer this question.

[Renji Asuka]

"If this face-up Special Summoned card leaves the field, return it to the bottom of the Deck."

This line gives you the answer. The answer is obviously yes. It doesn't care how it'd leave the field.