Here's my first ever Mako Tsunami deck. You know, the "Freaky Fish Guy" from Duel Monsters? Well, he got some support that focuses on having Umi on your field, the newest card being Kairyu-Shin - Leviathan. Your goal here is to get Umi on your field and ideally end on Leviathan, Umi, and Physalia. If you can't, your "Plan B" is sitting on Bahamut Shark and Toadally Awesome.
So you wanna go first every time. The side deck also runs cards like Warrior of Atlantis and Pot of Prosperity to help with consistency if needed. As for why I have Great White in my deck when 7 Colored Fish has higher ATK, it's because Great White was one of Mako's monsters, so it was thematically appropriate.
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