Xenophilius was coming from the Greengrass family, who were known to be in-between dark-grey. When he married Pandora Lovegood, a known light witch, Albus thought, he could use this, but it didn’t work, because Pandora was not really interested in the light side due to her upbringing. Albus hated it, how much control, he was losing. Now, the school would be taught to be neutral and that was something, he wanted to stop. Maybe he could use potions on the teachers, but Lucius announced the curriculum of the school and also the check-ups for the teachers, in order to check them up, if they had potions and spells. This threw his plans into the next trash can.