Melding Cubes are items in Solo Leveling:ARISE. Melding Cubes in Solo Leveling:ARISE are crucial in-game assets to farm. They help you Limit Break weapons for Sung Jinwoo and other Hunters and help you increase the overall power. Since you must Limit Break a weapon every 20 levels to level it up further, it is extremely crucial that you keep farming these cubes so you don't run out of them in important times.
There are five types of Melding Cubes in Solo Leveling Arise, and each is designated for an element. The Fire, Ice, Wind, Holy, and Dark Melding Cubes help in Limit Breaking the Fire, Water, Wind, Light, and Dark element weapons, respectively.