Mordekaiser was the first person we know of in what little lore we have about Necromancy to ever have used it or be a victim of it, Was it always there just never truly used or was Morde the first to use it and/or create it?
If we consider his oldest lore, he was the first undead.
If he was the first undead, then someone else resurrected him, that person would be the first necromancer.
But that is the old lore.
morde is the ruined king?
If i remember correctly his new lore, he seeked a ritual to become undead. I am not sure if he invented it by refining rudimental arts or if it was already present
