The new Cartomancer feat from The Book of Many Things (p. 49) states that "You can use a card deck as your spellcasting focus." It also has a feature, Hidden Ace, that says "when you finish a long rest, you can choose one spell from your class's spell list and imbue that spell into a card." After this you can "flourish the card and cast the spell within."
If the imbued spell has Verbal, Material, and/or Somatic components, are those components required at the time you imbue the spell, at the time you cast the spell, both, or neither? (Does the answer change if the spell has material components with a GP cost and/or material components that are consumed by the spell?)