If you choose both modes, and only one of the cards is still a legal target when Reviving Melody tries to resolve, only that card is returned to your hand.
Choose one or both —
• Return target creature card from your graveyard to your hand.
• Return target enchantment card from your graveyard to your hand.
You choose which mode you're using—or whether to use both modes—as you're casting the spell. Once this choice is made, it can't be changed later while the spell is on the stack.
