Look! A Giant Transformation in the Middle of the Night is the 24th episode of Ultraman Ace.
A boy named Kenta receives a sparkling red rock from his father. The rock resembles one of the shattered pieces of the dead Yapool. Meanwhile, a mysterious red rain begins falling all over the world, but TAC members can't discover the cause. Kenta's mother disappears. When he follows her, he finds her in a circle of candles, facing the terrible-monster, Mazarius.
- Ultraman Ace Volume 6 features episodes 21-24.