Pythagoras had heard about and seen his inventions and invited him to see their work and decide if he was interested in working with them. Richard had gone to see them and that was the first time he met professor Fox. A man of the same interest, but he did not only want to arm men with weapons. He wanted to create a physically stronger army.
Humans who could withstand and survive injuries, be faster and stronger. He focused on studying dragon blood and its healing abilities. What made them heal faster? Could human blood be constructed in such a way? His failed attempts that caused the dragon hunters to die shortly after made him seek Richard's assistance.
Richard was happy to help, but there was no way to make human blood look like the ones of dragons. There were components in their blood that didn't exist in human blood.
