To get the Fist of Darkness in Blox Fruits, you need to follow two main methods. First, hunt Sea Beasts by sailing around the Second Sea. Defeat these Sea Beasts, which have a 5% chance of dropping the Fist of Darkness.
The second method involves chest farming. Search for chests scattered around the Second Sea. Every 4 hours, there is a chance that a Fist of Darkness will spawn in one of these chests.
Both methods require patience and persistence, as they rely on chance. Stay dedicated, and you will eventually get the Fist of Darkness.
Remember to stay active and keep exploring the Second Sea. Keeping your eyes open for Sea Beasts and chests will increase your chances of success.
Good luck on your quest to obtain the Fist of Darkness in Blox Fruits!