Because there was something on the rat demon's body that was still somewhat useful, the Dragon Clan experts did not kill it outright. Compared to killing the chicken to take its eggs, they believed it was better to keep it alive and carve off its flesh, allowing them to harvest materials regularly—even if the quality of those materials would only grow worse and worse.
Whether Qing Xian's words were true or false, you did not know. But if they were true, then casting your spell on the rat demon might not have been a bad thing for it. At the very least, it could finally be freed and would no longer need to endure further torment.
The entire lifespan extension process was not long at all; it took you merely a quarter of an hour. Qing Xian, however, was not so relaxed. During that time, he had to retain the replenished life essence and prevent it from leaving his body.
This process might take several months, but afterward, Qing Xian would truly gain an additional fifteen million years of lifespan.
In any case, with two killing gods accompanying you, even at a Dragon Clan stronghold in the Dragon Realm, you had no fear that Qing Xian would dare play tricks and withhold what he had promised. You were not lacking a few months, so you brought Jin Chang Geng and Xue Que to reside temporarily in the Dragon Realm.
Although the Dragon Realm generally allowed only its own clan members and those closely connected to them to live there, a precious guest like you could stay for several thousand years without issue. The rules were not that rigid.
Your temporary residence was close to Jiang Ruohe and his lover, and you often saw Meng Yuan as well. Only Li Qingluan