If you choose both modes, and only one of the targeted cards is still a legal target when Remember the Fallen tries to resolve, only that card is returned to your hand.
01-06-2011
wotc
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.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.