Target player shuffles up to three target cards from their graveyard into their library.
Flashback(You may cast this card from your graveyard for its flashback cost. Then exile it.)
9/22/2011 You don’t have to target any cards when you cast Memory’s Journey, but you must target a player.
9/22/2011 If the player is an illegal target by the time Memory’s Journey resolves, the spell will have no effect, even if the cards are still legal targets. This is because a spell can’t make an illegal target (the player) perform any actions (such as shuffling their library).
9/22/2011 Any of the targeted cards that are illegal targets by the time Memory’s Journey resolves aren’t shuffled into their owner’s library.
9/22/2011 If no cards were targeted by Memory’s Journey or if all the targeted cards are illegal targets by the time Memory’s Journey resolves, the targeted player will still shuffle their library.
9/22/2011 If you cast Memory’s Journey with flashback, it won’t be in the graveyard when you choose targets. It can’t target itself.