Ten Thousand Days of Kindness

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Myriaday Dragon is a monster that can reach 10,000 ATK if you and an opponent have a life point difference of 10,000 life points. Instead of doing the reasonable thing and building this as a life gain deck, I've done the opposite! Using Transaction Rollback, you can pay half your life points and go to 4000, and copy the effect of Hatsugai, which lets us pay 3000 more life points, and if an opponent agrees to it, they gain 3000 life points. So in total, we would go down to 1000 LP, while that opponent would be at 11000 LP, which is a difference of 10,000! 

But this isn't a boring OTK deck. I have built the deck to play very low to the ground and defensive, using Bystials, Blue-Eyes and Primite to gather card advantage and have some small interruptions. The goal is to protect the weakest players in the duel, and stop the strongest players from taking over the game. We will save up our interactions to protect other players, using cards like Terrors of the Afterroot and Gigantic Thundercross that can stop the strongest player's plays, or support the weak players to help them catch up! Then, using the Fiendsmith engine, we can summon Beatrice, Lady of the Eternal to mill Rollback and Hatsugai, allowing us to do our 10,000 ATK combo and take out our strongest opponent with one single attack! From there, we will fight fairly against the remaining players, hopefully keeping Myriaday Dragon on the field so we can kill another opponent on our next turn, and hopefully win the game from there.