Though the two little dragons now appear respectful towards him, in essence, they are still Evil Dragons, possessing 'excellent' qualities such as chaos, disorder, irritability, cunning, evil, and unreliability.
Udi doesn't believe he has the ability to train two obedient and trustworthy Black Dragons. Even if he had that ability, he doesn't have the energy, unlike those idle ones who like to steal White Dragon Eggs and cultivate them into kind White Dragons, like the Crystal Dragon does.
"Do you really need to sign the contract..." Heloise was somewhat reluctant, but after meeting Udi's half-smiling gaze, she obediently chose to sign the contract.
As for Brook, this fellow was relatively straightforward, or rather, it was more accepting of reality than Heloise. When Udi mentioned signing the contract, it nodded in agreement enthusiastically.
Udi took out two dragon scales, shed during growth, from the Spatial Bag, drawing on them with magic and spirit.
