MurphysParadox |
When crafting magic items, the listed spells are required to be cast once a day every day the item is being crafted. So spell sage would work fine for magic items that require only a single cleric/bard/druid spell to craft. However, something that requires multiple ones would require you to expend use of the ability multiple times. But so long as you spend the necessary wizard spell slots via the rules of Spell Study, it should work.