Yugoloths

Created by Night Hag
Subset of Greedy
Summoned by Books of Keeping
Minion of General of Gehenna
Minion of Arcanaloth
Created by Asmodeus, Lord of the Nine Hell
Superset of Arcanaloth
Found in Gehenna
Found in Acheron
Found in Hades
Found in Carceri
Afraid of Books of Keeping