Advancing from a Boss Template to a Lord was quite complicated, and extremely difficult.
First of all, not every Boss Tier creature could advance to become a Lord.
According to Bai Xiaowen's estimate, evolving from a Boss Tier creature into a Lord required enduring at least 50 points of Death God's Power.
This differed from the original selection of racial leaders. At that time, the leaders of the four major races had yet to be decided, and all four slots under Bai Xiaowen, the rookie "Death God," were vacant. Therefore, only 10 points of Death God's Power were needed for the leaders of the four races to stand out. For creatures who were already Boss Tier, enduring 10 points of Death God's Power was nothing much.
But now, the slots of the Four Heavenly Kings were already full, and the four shortcuts to advancement had all been taken.
To evolve from Boss Tier to Lord now required several times, or even ten times, the effort.
Take the Plague Behemoth, Butcher's nominal mount, for example.
It was only nominal because Butcher preferred walking on two legs and had never ridden it.
After absorbing 40 points of Death God's Power, the Plague Behemoth exploded on the spot. Naturally, it had no chance of becoming a Lord.
Then there was the Bonefolk Lich. Its results were slightly better than the Plague Behemoth's, but its limit was only 45 points of Death God's Power. It could not advance even a step further.
Of course, the Lich was already Quasi-Lord Tier by then, far stronger than a Bone Warlock. Unfortunately, there was still a gap between it and a Lord. The difference in priority could not be erased.
Where there was bad news, there was naturally good news as well.
After the Frost Dragon mount