Mako Tsunami ( Duel Links ) Mako Tsunami is a playable Legendary Duelist in " Yu - Gi - Oh ! Duel Links " . This is a video game depiction of Mako Tsunami , a character from the " Yu - Gi - Oh ! " anime . He appears in - game after the player claims his Character Unlock Mission reward for successfully conducting 150 Tribute Summon s / Set s . Mako also appears as an opponent during the special events and Blue Gate Key s are required to Duel Mako Tsunami at the Gate . Biography . Immediately after the player claims the reward for Mako Tsunami ' s appropriate Character Unlock Mission , they will encounter Mako for the first time . He will give an exclamation of surprise upon seeing his surroundings , before declaring that this is splendid since he can see a whole of prey . He briefly laughs , predicting that he ' ll bring in " a haul of a lifetime , " but then turns serious , saying that Duelists should now prepare to feel the full fury of the open waters . Until the player defeats Mako for the first time , whenever they challenge Mako to a Duel , he will be surprised and incredulously ask the player if they are actually serious in wanting to Duel him . He then laughs , before remarking that it seems a big fish has wandered into his waters . Mako then accepts the player ' s challenge , saying that he never turns down a Duel , but further warns the player that they ' ve made a huge mistake by " swimming into [ his ] net . " He concludes his dialogue by telling the player , " Prepare to sleep with the fishes ! " Upon Mako ' s first defeat , he gives a brief exclamation of frustration and admits the player won . He goes on to compliment the player , saying that they ' re as impressive as a shark among . However , he also declares that this defeat won ' t stop him from owning his own boat and sailing the ocean , and promises that until he " casts off " again , he will never give up . After the player redeems their final unclaimed reward for Mako Tsunami ' s Character Unlock Missions , they will encounter Mako again , who explains that since he can ' t head out into the sea until he has his own fishing boat , this is the reason why he ' ll become the number one Duelist , as the prestige from that position will allow him to acquire his ship . He goes on to declare that he and the ocean await each other , and that he is looking forward to facing everything that the waters have in store for him . However , he also declares he won ' t be traveling alone - he ' ll be sailing with his " The Legendary Fisherman " card , which he has won countless Duels together with , and will continue to keep winning with . Decks . Duelist Chronicles : Set Sail for the Kingdom . Level 20 . Skill : " Dueling Arena : Ocean " ( Begin Duel with the Field Spell " Umi " activated . ) Level 40 . Skill : " Dueling Arena : Ocean " ( Begin Duel with the Field Spell " Umi " activated . ) Duelist Chronicles : Battle City Begins ! Level 20 . Skill : " Mythic Depths " ( Begin Duel with the Field Spell " Umi " activated . ) Level 40 . Skill : " Mythic Depths " ( Begin Duel with the Field Spell " Umi " activated . ) Level - up rewards . The following lists are the rewards the player accumulates from having Mako Tsunami reach a certain Level . Duel rewards . When dueling against Level 40 Mako Tsunami , these are the only cards that can drop ; at lower levels , cards from the standard pool for Legendary Duelist s may also drop .