I became a necromancer, and I am still the weakest kind - the bone dragon regards me as an ant, the knights want to purify me, and even the Holy See lists me as a heretic who must be killed.
Until the system was activated and told me that the Undead Knight was actually a contract profession, and I happened to be the last living person in the world who could command the Bone Dragon.
From then on, the bone dragon is the mount, the undead knight is the thug, and I raise the dragon when others summon the skeleton.
When an army of millions of undead marched through the Holy City, and the Pope knelt down and begged me to sign a peace contract, the skeletal dragons behind me blocked the sky and the sun - where did I go? I had just learned to knock the dragon eggs, and even the devil's legs were weak after seeing what was hatched.