"Why?"
Delarosa softly explained, "A snake cannot survive without a head. Each of these giant beasts is incredibly powerful, and coupled with their bloodlines, subjugating them to bend to your will is not easy."
"You may defeat them, but what runs in their veins makes it difficult for them to submit to the Human Race."
"You subdued the Golden-Winged Great Roc because it saw you when it hatched and you raised it, so it regards you as a parent."
"Spencer subdued the Golden Giant Ape because she saved its life and treated it as a friend, which is why it accepted her."
"Demonic beasts may not submit to powerful humans, but they will certainly submit to a stronger demonic beast. So, to command them smoothly and use them as if they were your own limbs, you need a beast king more powerful than them, who can communicate with you and obey your commands."
