Gold Magic Dust is a Crafting Ingredient in Cubic Castles. Just like the other magical dusts, it can only be forged to Gold Magic Gem, an important material in order to craft Knock Back Wand.
How to obtain
To obtain Gold Magic Dust, you must catch Faries, a creature found in Forest Mines and Tropical Mines. Although you can also find them in bought Rooms/Realms with forest or tropical theme.