Undead Monarch: the Paladin Is Used as a Skeleton Soldier at the Beginning

I traveled through time and became a zombie. I wanted to keep a low profile and infect a few villagers with their obscene development. Unexpectedly, the residents of this other world had no knowledge about the undead, so they regarded me as a harmless skeleton soldier and sent me to the Necromancer Academy. Just when I was infecting all the teachers and students in the school and building an army of the undead, However, the Holy See happily announced: A rare skeleton genius has arrived on the mainland! They respectfully invited me into the Holy City and begged me to receive the Pope's blessing. Looking at the unsuspecting Templars and bishops in front of me, I couldn't help but show my zombie fangs—— Now, the entire Holy See will become my infected army... ---