Izzet Gizmometry is one of the three pre-constructed decks introduced in the Guildpact expansion, part of the Ravnica block.
Guildpact Theme Deck
The "Izzet Gizmometry" deck does what the mad Izzet scientist-wizards do best: Whip up tons of nasty instants and sorceries—with explosive results! This deck is jam-packed with instant and sorcery spells, many of which can copy themselves thanks to replicate. Nearly all the creatures in the deck reward you when you play instants and sorceries as well! The replicated copies won't trigger your creatures' abilities, but who cares? You're getting tons of extra spells! It all adds up to an avalanche of magical craziness that'll bury your opponent.
Early in the game, your goal is just to stay alive as you play out your lands. Spells like Electrolyze, Repeal, and Runeboggle all help keep the board clear of annoying attackers while drawing you valuable extra cards. When you can, start deploying your creatures. Gelectrode, Tibor and Lumia, and the enchantment Leyline of Lightning all let you deal extra damage each time you play an instant or sorcery. If you can zap an enemy creature, great! If instead you have to zap your opponent, great! Wee Dragonauts is your main route to victory—depending on how many spells you play, they can bash in for 3, 5, or even 7 damage a turn.
Once you've built up your lands, you can use all that mana to copy your replicate spells a bazillion times. Replicate spells are flexible enough to be good both early in the game and late. Don't hesitate to play Pyromatics or Thunderheads to kill a single enemy creature if you don't have enough mana to replicate them.
Izzet Chronarch is the deck's secret weapon: It lets you pull the exact instant or sorcery you need out of your graveyard. For extra trickiness, use Peel from Reality or Vacuumelt to return Izzet Chronarch and one of your opponent's creatures to their owners' hands, then replay the Chronarch to get that particular spell back. You can keep your opponent's best creature off the table forever.
Like one of the Izzet's mad experimenters, you can customize this deck in a variety of ways. You can combine more Wee Dragonauts and Gelectrodes with cheap card drawing like the Ninth Edition set'sSleight of Hand to churn out bonus damage as fast as possible. Or you can add more Guildpact Izzet cards, like Niv-Mizzet, the Firemind. It's a lot like a Gelectrode . . . that's also a legendary flying 4/4 card-drawing Dragon!
* = from a previous set