"Yes, you don't have to kill a Dragon to use Dragon Force since you are a half-dragon like Aaron. So, in other means. You have an advantage in there as you need to drink a dragon's blood to awaken your Dragon Force."
To think logically by the younger twin. She said the things correctly that spilling the Dragon's blood wasn't mean that he had to kill her, to be able to think about it. The younger twin lamented as he just realized about that.
"Shit! I'm way too stupid to think that out! I don't have to kill you to do this seriously. Glad mama has to tell me about it. Or else... I might consider eating Iblis Metoria to unlock Dragon Force brutely."
To know that he would say so, she chuckled with herself, saying.
"It's a win-win solution for you, do you? Since you don't have to kill me and yet, you can unlock Dragon Force to defeat Zadkiel."
"Indeed, mama." The younger twin replied in a glad tone that he felt glad that he didn't have to kill her although he had to drink her blood.