Like a hot knife through butter.

Once the shrunken orange beast core came in contact with the hilt of the bastard sword, the fusion process began.

The large amount of energy being generated was so much that they began creating mana channels that traveled all around the sword. By distributing the energy throughout the sword, not only was it preventing the sword from getting destroyed, but it was creating mana pathways that enabled the sword to cast spells.

In a matter of seconds, the mana channels were complete, but the fusion process was nowhere done. With no other place for the energy to go, it began depositing in the pathways and if left any longer the sword's structural integrity would be ruined.

That was when professor Tacitus placed the 4 yellow crystals at the center part of the blade directly above the hilt.