Order of St Michael
The Order of St Michael is much older, but a bit like DAO in it's focus on the study of Abnormal beings. The problem is, unlike the current administration of the DAO, the Order believes that the world would be better without the cryptid races that have evolved alongside humanity.
To that purpose, they dedicate themselves to wiping out the abnormal, mostly cryptids and metas. Lately they've taken to resorting to magic and therefore allowing, using or trusting magi.
They also have a 0.01% attrition rate. In the past 300 years, they have lost exactly 4 people. This is unforgivable. They strive for 0%. This means you do not quit, so much as cease to breathe.
Of those four people, two are directly related to Amy. The other two married into her family. This is worse than unforgivable and in fact Healys known or even believed to be related to those four who left the order face a Kill On Sight