To get the Cursed Dual Katana in Blox Fruits, start by obtaining Tushita and Yama. For Tushita, defeat Longma, a level 2000 boss. To get Yama, complete the Elite Hunter’s quest by killing 30 Elite Pirates, then go to the Secret Temple behind the waterfall on Hydra Island and pull the sword.
Next, increase your mastery levels. Achieve at least 350 mastery on both Tushita and Yama. This mastery is essential to progress further in obtaining the Cursed Dual Katana.
Then, complete the trials for the Yama Scroll. For the Pain and Suffering trial, let an enemy attack you until you die. In the Haze of Misery trial, find and kill an NPC with purple markings. For the Fear the Reaper trial, get Hallow Essence by farming Bones and rolling the surprise every two hours, then let the Soul Reaper kill you and complete the tasks in Hell.
After the trials, summon the Cursed Skeleton Boss by placing the six Alucard Shards on the pedestal at the front of the mansion. These shards are obtained from the trials. Finally, defeat the Cursed Skeleton Boss using either Tushita or Yama to receive the Cursed Dual Katana.
This process takes significant effort and skill, but the reward is one of the most powerful swords in Blox Fruits. Follow these steps, and you’ll wield the Cursed Dual Katana in no time.