The Young Man of Mystery (謎の少年, Nazo no Shōnen; lit. "The Mysterious Boy") is the three hundred thirty-first chapter of the Dragon Ball manga. This chapter's anime counterpart is the end of the episode "The Mysterious Youth" and the episode "Another Super Saiyan?"
Frieza asks Future Trunks, who has landed in front of him and his father, what he wants. Future Trunks stoically answers that he has come to kill them. Frieza laughs this off and says that ignorance is bliss, but is surprised when Future Trunks asks if he is Frieza. Frieza says that although he is honored to be known in the outskirts of the galaxy, he is the most powerful being in the universe. He tells one of his soldiers to kill Future Trunks. The soldier, whose scouter tells him that Future Trunks has a power level of only 5, eagerly shoots. Future Trunks easily deflects the blast and defeats the soldier with a single blow. Frieza is still unfazed, and the rest of the soldiers attack. Future Trunks defeats them all quickly, and the Z Fighters are shocked when they feel his ki from the battle. Krillin, noting that a bunch of kis disappeared, wonders what is happening.
Future Trunks then states that he will kill Frieza and King Cold. Frieza says the half-strong die first, and that he will show Future Trunks the hard way, but Future Trunks says that he knows he will win. Future Trunks tells Frieza to bring everything he has, since he is not a pushover like Goku. Frieza is surprised that Future Trunks knows about Goku, and Future Trunks says that Frieza made a miscalculation in thinking that Goku was the only Super Saiyan. He then becomes a Super Saiyan himself, much to Frieza's shock. The Z Fighters are stunned by the massive ki, which Gohan says is similar to Goku's when he became a Super Saiyan.
Frieza then fires a Ki Blast at Future Trunks, who easily dodges and gets behind his opponents. He yells out to Frieza, and then unleashes a Burning Attack. Frieza and King Cold dodge by leaping into the air, but Future Trunks comes in from above. He draws his sword and hits Frieza, slicing him clean in half.
- Future Trunks
- King Cold
- Tien Shinhan