DupleCraft Mod adds a new ore called Duple Ore. It drops 1-2 Duple Dust. This purple dust can do mighty and powerful things! When combined with another item or block, they seem to take on the same exact characteristics and properties of the item or block they were combined with. In fact, they become whatever item or block they were combined with. Duple all your iron! Duple all your gold! Duple all your diamonds! DUPLE ALL THE STUFF!!! There are exceptions though? pretty much, only raw materials can be dupled.
The duple dust can also be crafted into the almighty DUPLE STICK! An item once used by the makers of the Strongholds, it can duple mobs! Craft it and hit a mob, and watcha know, a clone of the original! Duple all your chickens! Duple all your pigs! Duple all the creepers! Duple all your golems! DUPLE ALL THE MOBS!! (Players, of course, cannot be dupled; neither can EnderDragons.) Duple sticks only have 3 uses however, so use them wisely.
All about fusing:
Miscellaneous Fusing Recipes: