Each deck features its own special Commander (both oversized and regular-sized), plus 15 never-before-printed cards.
Description:

1 Mizzix of the Izmagnus

1 Goblin Electromancer
1 Jace's Archivist
1 Talrand, Sky Summoner
1 Psychosis Crawler
1 Lone Revenant
1 Charmbreaker Devils
1 Etherium-Horn Sorcerer
1 Melek, Izzet Paragon
1 Dragon Mage
1 Gigantoplasm
1 Broodbirth Viper
1 Illusory Ambusher
1 Warchief Giant
1 Arjun, the Shifting Flame

1 Preordain
1 Faithless Looting
1 Vandalblast
1 Mizzium Mortars
1 Windfall
1 Mystic Retrieval
1 Stolen Goods
1 Rite of Replication
1 Sleep
1 Chain Reaction
1 Call the Skybreaker
1 Blatant Thievery
1 Epic Experiment
1 Mizzix's Mastery
1 Meteor Blast

1 Blustersquall
1 Brainstorm
1 Echoing Truth
1 Desperate Ravings
1 Urza's Rage
1 Counterflux
1 Aetherize
1 Fact or Fiction
1 Reins of Power
1 Steam Augury
1 Word of Seizing
1 Act of Aggression
1 Prophetic Bolt
1 Firemind's Foresight
1 Repeal
1 Comet Storm
1 Magmaquake
1 Stroke of Genius
1 Dominate
1 Blue Sun's Zenith
1 Mystic Confluence
1 Aethersnatch
1 Mirror Match

1 Sol Ring
1 Izzet Signet
1 Worn Powerstone
1 Thought Vessel
1 Seal of the Guildpact

1 Thought Reflection
1 Awaken the Sky Tyrant
1 Rite of the Raging Storm

1 Command Tower
1 Evolving Wilds
1 Izzet Boilerworks
1 Izzet Guildgate
1 Reliquary Tower
1 Rogue's Passage
1 Spinerock Knoll
1 Swiftwater Cliffs
1 Temple of the False God
1 Terramorphic Expanse
1 Vivid Crag
1 Vivid Creek
14 Island
13 Mountain