Hidden Ace. When you finish a long rest, you can choose one spell from your class’s spell list and imbue that spell into a card. The chosen spell must have a casting time of 1 action, and it must be a level for which you have spell slots. The card remains imbued with this spell for 8 hours. While the card is imbued with the spell, you can use a bonus action to flourish the card and cast the spell within. The card then immediately loses its magic.
How does that work exactly? AFAIK, imbue is not a "term of art" in 5e. Does it consume a spell slot? If so, is the slot expended when you imbue the spell or when you cast it? It seems to me that the implication is that you use up a slot when you actually cast the spell, but I'm not 100% sure.
