At https://www.animelyrics.com/anime/ta...amenosekai.jis The line "滅びの振り子に あらがう者よ" should be translated "Oh, those who stand against the pendulum of destruction." 振り子 is a set phrase meaning "pendulum", and we're given the kanji. "Child who pretends to be destruction" would be 滅びをフリ子 with an を anyway.