The Art of Darkness
- Episode aired Dec 7, 2019
- TV-Y7-FV
![D.N. Ace (2019)](https://m.media-amazon.com/images/M/MV5BZWEzY2RiMjAtOTBmMC00YjRhLWFjYTktN2Q0OTc0NjExZmRhXkEyXkFqcGdeQXVyMTA1NDg4MjU3._V1_QL75_UY281_CR154,0,190,281_.jpg)
After goofing off during a training session, Ace and crew are invited to an underground secret clash session where his team vanishes one by one.After goofing off during a training session, Ace and crew are invited to an underground secret clash session where his team vanishes one by one.After goofing off during a training session, Ace and crew are invited to an underground secret clash session where his team vanishes one by one.