I don’t Believe This is certainly legitimate. It only doubles the length of 1m+ spells, to a utmost of 24 hrs. Implying that any spell that has a duration >12hrs would not be doubled, but rather capped at 24 hrs. But a 1m spell only turns into a 2m spell, https://dungeonsanddragonspaladin78887.bloggip.com/18501208/dungeons-and-dragons-paladin-secrets