Duel Decks

Duel Decks was a series of theme decks that started in 2007 with Elves vs. Goblins. Each pack contained two 60-card decks designed and developed specifically to be played against each other. The series ended in 2018 with Elves vs. Inventors when the product line was replaced by the Challenger Deck series.

Contents
Cards appearing in these sets may be from any non-Un set in Magic history but are in the post 8th Edition card frame, with a black border. Each set has its own expansion symbol. The first in the series, Duel Decks: Elves vs. Goblins, contained eight rares, including two foil rares with alternate artwork. Later sets in the series changed this this to two foil mythic rares with alternate artwork, and between six and ten rares, as well as four non-foil cards with alternate artwork (except for Divine vs. Demonic, which had five). Many of the mythic rares were originally printed as rares, and have been changed mythic status for the duel deck. Some of the cards also have new flavor text.

Flavor
Each set depicts a notable rivalry. Until Venser vs. Koth, the sets alternated between showing two rival factions, and two rival planeswalkers, and often tie into current or future storylines. For example, Elves vs. Goblins was released during the tribal block of Lorwyn; Jace vs. Chandra tied into the webcomic Fuel for the Fire; and Phyrexia vs. the Coalition, Elspeth vs. Tezzeret, and Venser vs. Koth tie into the Scars of Mirrodin block.

List of Duel Decks

 * Elves vs. Goblins (2007) (reprinted in Duel Decks Anthology (2014))
 * Jace vs. Chandra (2008) (reprinted in Duel Decks Anthology (2014))
 * Divine vs. Demonic (2009) (reprinted in Duel Decks Anthology (2014))
 * Garruk vs. Liliana (2009) (reprinted in Duel Decks Anthology (2014))
 * Phyrexia vs. The Coalition (2010)
 * Elspeth vs. Tezzeret (2010)
 * Knights vs. Dragons (2011)
 * Ajani vs. Nicol Bolas (2011)
 * Venser vs. Koth (2012)
 * Izzet vs. Golgari (2012)
 * Sorin vs. Tibalt (2013)
 * Heroes vs. Monsters (2013)
 * Jace vs. Vraska (2014)
 * Speed vs. Cunning (2014)
 * Elspeth vs. Kiora (2015)
 * Zendikar vs. Eldrazi (2015)
 * Blessed vs. Cursed (2016)
 * Nissa vs. Ob Nixilis (2016)
 * Mind vs. Might (2017)
 * Merfolk vs. Goblins (2017)
 * Elves vs. Inventors (2018)

Magic Online only release

 * Mirrodin Pure vs. New Phyrexia (2013)

April Fool's Jokes
Wizards has 'announced' two fake Duel Deck related products on April 1, as part of April Fool's Day. In 2008 Wizards announced a Duel Decks: Pirates vs. Ninjas. In 2011 they announced a Duet Decks: Liliana with Gideon, a play on the Duel Deck concept that was "designed for out-of-the-box Two-Headed Giant" play.