Blade of Duality

The Blade of Duality is an epic sword found in Silver Challenge Chests on Pirate Battlemaster Settlement islands. This blade grants two buffs that changes its attributes depending on the time of Day and Night.

Sunlight Buff: 10 max health and 10 strength

Night Buff: 5% crit chance and 100% critical hit damage

Source

 * Silver Pirate Challenge Chest
 * Battlemaster Settlement Islands

Trivia

 * During the night, the Blade of Duality has the same stats as the Pirate Cutter, with 1 more damage on the primary attack.
 * This blade can be considered one of the most powerful weapons in the game, due to its high damage output, the two buffs it grants and its relatively fast speed.
 * The critical hit chance effect at night has been reduced to 5% in version 2.0.