Changes:
Deadly Rollick is now banned.
Flawless Maneuver is now banned.
The One Ring is now banned.
Eidolon of the Great Revel is now legal.
High Tide is now legal.
Changes:
Dihada, Binder of Wills is now banned as a commander.
Comet, Stellar Pup is now banned.
Hogaak, Arisen Necropolis is now banned.
Mox Amber is now banned.
Changes:
Trazyn the Infinite is now banned.
No Changes
No Changes
Changes:
Yoshimaru, Ever Faithful is now legal.
Changes:
Minsc & Boo, Timeless Heroes is now banned as a commander.
Changes:
Shorikai, Genesis Engine is now banned as a commander.
Bazaar of Baghdad is now banned.
Ragavan, Nimble Pilferer is now banned.
Serra's Sanctum is now banned.
No Changes
Changes:
Yoshimaru, Ever Faithful is now banned as a commander.
Bruse Tarl, Boorish Herder is now legal.
Jeska, Thrice Reborn is now legal.
Keleth, Sunmane Familiar is now legal.
Kraum, Ludevic's Opus is now legal.
Livio, Oathsworn Sentinel is now legal.
Ludevic, Necro-Alchemist is now legal.
Reyhan, Last of the Abzan is now legal.
Rograkh, Son of Rohgahh is now legal.
Tymna, the Weaver is now legal.
Other Changes:
As of now, it is possible to only play one of the Commanders in the command zone.
Changes:
Kraum, Ludevic's Opus is now banned as a commander.
Livio, Oathsworn Sentinel is now banned as a commander.
Marath, Will of the Wild is now legal.
Teferi, Temporal Archmage is now legal.
No Changes
Changes:
Asmoranomardicadaistinaculdacar is now banned as a commander.
Winota, Joiner of Forces is now banned as a commander.
Maddening Hex is now banned.
Changes:
Inalla, Archmage Ritualist is now banned as a commander.
Ragavan, Nimble Pilferer is now banned as a commander.
Gifts Ungiven is now banned.
No Changes
Changes:
Ardenn, Intrepid Archaeologist is now banned as a commander.
Keleth, Sunmane Familiar is now banned as a commander.
Krark, the Thumbless is now banned as a commander.
Ludevic, Necro-Alchemist is now banned as a commander.
Reyhan, Last of the Abzan is now banned as a commander.
Rograkh, Son of Rohgahh is now banned as a commander.
Changes:
Esior, Wardwing Familiar is now banned as a commander.
Jeska, Thrice Reborn is now banned as a commander.
Fireblast is now legal.
Changes:
Akiri, Line-Slinger is now banned as a commander.
Omnath, Locus of Creation is now banned as a commander.
Thrasios, Triton Hero is now banned as a commander.
Tymna, the Weaver is now banned as a commander.
Jeweled Lotus is now banned.
Uro, Titan of Nature's Wrath is now banned.
Other Changes:
New fixed schedule for announcements: the last monday of every odd month
Changes:
Genesis Storm is now banned.
Other Changes:
On June 10, Wizards of the Coast published an announcement removing some very old cards from competitive play. This change will also apply in Duel Commander.
Changes:
Lutri, The Spellchaser is now banned.
Deflecting Swat is now banned.
Fierce Guardianship is now banned.
High Tide is now banned.
Capture of Jingzhou is now banned.
Temporal Manipulation is now banned.
Time Warp is now banned.
Cavern of Souls is now banned.
Field of the Dead is now banned.
Wasteland is now banned.
Lion's Eye Diamond is now banned.
Gifts Ungiven is now legal.
Jace, Vryn's Prodigy is now legal.
Changes:
Thassa's Oracle is now banned.
Ancient Tomb is now banned.
Mox Opal is now banned.
Sulfuric Vortex is now legal.
Changes:
Emry, Lurker of the Loch is now banned as a commander.
Edric, Spymaster of Trest is now banned as a commander.
Scapeshift is now banned.
Changes:
Arahbo, Roar of the World is now banned as a commander.
Najeela, the Blade-Blossom is now banned as a commander.
Teferi, Temporal Archmage is now banned as a commander.
Urza, Lord High Artificer is now banned as a commander.
Yuriko, the Tiger's Shadow is now banned as a commander.
Edric, Spymaster of Trest is now legal.
Erayo, Soratami Ascendant is now legal.
Zur the Enchanter is now legal.
Timetwister is now banned.
Other Changes:
The London mulligan is now legal in Duel Commander as every other formats.
Changes:
Baral, Chief of Compliance is now banned as a commander.
Prime Speaker Vannifar is now banned as a commander.
No Changes
No Changes
Changes:
Zurgo Bellstriker is now banned as a commander.
Other Changes:
Players can now swap their commanders between each game of the same round.
No Changes
Changes:
Fastbond is now banned.
Changes:
Edgar Markov is now banned as a commander.
Fireblast is now banned.
Eidolon of the Great Revel is now banned.
Sulfuric Vortex is now banned.
Price of Progress is now banned.
Changes:
Geist of Saint Traft is now banned as a commander.
Jace, Vryn's Prodigy is now banned as a commander.
Bruse Tarl, Boorish Herder is now banned as a commander.
Polymorph is now banned.
Emrakul, the Aeons Torn is now banned.
Ancient Tomb is now legal.
Mind Twist is now legal.
Fastbond is now legal.
Changes:
Breya, Etherium Shaper is now banned as a commander.
Vial Smasher the Fierce is now banned as a commander.
Yisan, The Wanderer Bard is now legal.
Chrome Mox is now banned.
Mox Diamond is now banned.
No Changes
Other Changes:
Starting with the Commander 2016 update (on November 11th, 2016), Duel Commander will be played with 20 life points instead of 30.
Changes:
Marath, Will of the Wild is now banned as a commander.
Necrotic Ooze is now banned.
Dig Through Time is now banned.
Treasure Cruise is now banned.
Changes:
Tasigur, the Golden Fang is now banned as a commander.
Yisan, the Wanderer Bard is now banned as a commander.
Gaea's Cradle is now banned.
Other Changes:
The "true colorless" mana can no longer be obtained from "any mana" generated from outside the color identity.
Changes:
Cataclysm is now legal.
Other Changes:
Cards which generate mana of any color (City of Brass, Coalition Relic, Birds of paradise, ...) allow their controllers to use cards that require "true colorless" mana if the commander doesn't have a 5-color identity.
Changes:
Sensei's Divining Top is now banned.
Other Changes:
The Vancouver mulligan is now legal in Duel Commander.
Changes:
Mystical Tutor is now banned.
Other Changes:
The commander can now be put in the command zone instead of going to the hand.
Changes:
Entomb is now banned.
Food Chain is now banned.
Fastbond is now banned.
Winter Orb is now legal.
Crucible of Worlds is now legal.
Sensei's Divining Top is now legal.
Braids, Cabal Minion is now legal.
No Changes
Changes:
Derevi, Empyrial Tactician is now banned as a commander.
Oloro, Ageless Ascetic is now banned as a commander.
Rofellos, Llanowar Emissary is now banned as a commander.
Ancestral Recall is now banned.
Back to Basics is now banned.
Black Lotus is now banned.
Channel is now banned.
Grim Monolith is now banned.
Hermit Druid is now banned.
Humility is now banned.
Imperial Seal is now banned.
Karakas is now banned.
Library of Alexandria is now banned.
Loyal Retainers is now banned.
Mana Crypt is now banned.
Mana Drain is now banned.
Mana Vault is now banned.
Mishra's Workshop is now banned.
Mox Emerald is now banned.
Mox Jet is now banned.
Mox Pearl is now banned.
Mox Ruby is now banned.
Mox Sapphire is now banned.
Natural Order is now banned.
Oath of Druids is now banned.
Protean Hulk is now banned.
Sol Ring is now banned.
Strip Mine is now banned.
The Tabernacle at Pendrell Vale is now banned.
Time Vault is now banned.
Time Walk is now banned.
Tinker is now banned.
Tolarian Academy is now banned.
Vampiric Tutor is now banned.