Exiled cards that might return to the battlefield or any other zone should be kept in separate piles to keep track of their respective ways of returning. Exiled cards that may have an impact on the game due to their own abilities (such as cards with haunt) or the abilities of the cards that exiled them should likewise be kept in separate piles.
May 1, 2014 · Journey into Nyx
An object may have one ability printed on it that causes one or more cards to be exiled, and another ability that refers either to “the exiled cards” or to cards “exiled with [this object].” These abilities are linked: the second refers only to cards that have been exiled due to the first. See rule 607, “Linked Abilities.”
September 30, 2011 · Innistrad
An object may have one ability printed on it that causes one or more cards to be exiled, and another ability that refers either to "the exiled cards" or to cards "exiled with [this object]." These abilities are linked: the second refers only to cards that have been exiled due to the first. See rule 607, "Linked Abilities."
June 17, 2011 · Commander 2011
An object may have one ability printed on it that causes one or more cards to be exiled, and
April 1, 2011 · Duel Decks: Knights vs. Dragons
An object may have one ability printed on it that causes one or more cards to be exiled, and another ability that refers either to "the exiled cards" or to cards "exiled with [this object]." These abilities are linked: the second refers only to cards that have been exiled due to the first. See rule 607, "Linked Abilities."
February 4, 2011 · Mirrodin Besieged
An object may have one ability printed on it that causes one or more cards to be exiled, and another ability that refers either to “the exiled cards” or to cards “exiled with [this object].” These abilities are linked: the second refers only to cards that have been exiled due to the first. See rule 607, “Linked Abilities.”
October 1, 2010 · Scars of Mirrodin
An object may have one ability printed on it that causes one or more cards to be exiled, and
February 1, 2010 · Worldwake
An object may have one ability printed on it that causes one or more cards to be exiled, and another ability that refers either to "the exiled cards" or to cards "exiled with [this object]." These abilities are linked: the second refers only to cards that have been exiled due to the first. See rule 607, "Linked Abilities."