The Game Plan:
The goal of this deck is to play the card Restore Balance as efficiently and effectively as possible. When used correctly, this card can decimate your opponent's creatures, lands, and cards in hand. The converted mana cost of each card in the deck is 3 or more, so when we cascade with Ardent Plea or Violent Outburst, we are guaranteed to hit Restore Balance every time. It can also be played immediately with As Foretold. There are no creatures in the deck that we intend to put into play, so it will always be a one-sided boardwipe. We play artifact-based mana sources so that when we Restore Balance it will be a one-sided mass land destruction effect; we can also use Greater Gargadon to sacrifice extra lands we have, to completely wreck the opponent's mana base. Finally, we try to "cheat" on costs as much as possible, so that we can make meaningful plays before Turn 3, and so that we may empty our hand as much as possible for the discard clause on Restore Balance. Tezzeret the Seeker's ultimate is our main kill, as it creates creatures out of nowhere that also go away after the turn, so it works the best with our balance gameplan. Games can also be closed out with Greater Gargadon, as it is only a 2 turn clock with Ardent Plea in play.
Additional Disruption:
Beast Within - a main-deck catch-all, it is used to convert pesky artifacts, enchantments, and planeswalkers into creatures that we can eliminate via Restore Balance. It is an auto-include in my opinion for any Restore Balance deck that uses Violent Outburst. Sometimes it can be used to target lands as well.
Teferi, Time Raveler - Proactively denies our opponents the ability to interact with countermagic or any other form of disruption in response to our combo. It can also be used to bounce pesky permanents as well as digging us to our important pieces. Additionally it soaks up some damage to buy enough time for us to execute our gameplan. Yet another use, is that we can cast Restore Balance at instant speed if we have As Foretold in play.
Force of Negation - Can protect our instant speed Violent Outburst cascade, as well as countering certain problematic early game cards that our Restore Balance doesn't interact with, such as planeswalkers and burn spells.
Blood Moon - Obviously very good versus any opponent that isn't playing heavy red and has very few basic lands.
Sideboard:
Dismember - The main reason to include this card is to kill Thalia, Guardian of Thraben. She is incredibly annoying for this deck to deal with. Since most of our spells costs 3 or more, she slows down our gameplan dramatically. She also makes it so that our cascade combo costs 5 instead of 3. Dismember is the most efficient answer for her, able to be played as early as turn 2, for us to continue with business as usual on turns 3 and so on. This card can also be used to kill Ethersworn Canonist, Archon of Emeria, and Eidolon of Rhetoric. These cards are brutal for this deck to deal with, as they completely shut off the cascade part of our combo.
Force of Vigor - Since Restore Balance doesn't interact with artifacts or enchantments, this card comes in when the opponent plays a reasonable amount of these that we care about, such as Stony Silence and other forms of disruption for our plan. It can also be used to kill Ethersworn Cannonist, Eidolon of Rhetoric, and Rule of Law.
Patrician's Scorn - Mostly included for Stony Silence, but it's also good for enchantment-based prison strategies.
Bloodmoon - Again, for opponents with greedy mana bases.
Leyline of Sanctity - Mostly to stop Thoughtseize and Inquisition of Kozilek from stripping away key pieces from our hand. Can also be useful to slow down or stop certain strategies like Burn, Storm, Mill, Heliod combo etc.
Leyline of the Void - For graveyard-based strategies obviously. Some decks, like dredge for instance, can have their board completely wiped and reassemble as early as the next turn. This will stop their strategy from getting going in the first place, as well as preventing the reassembly. Also stops more niche strategies like Goryo's Vengeance and Archbound Ravager nonsense.
Mistveil Plains - Specifically for grindy match-ups where 4 Restore Balance may not be enough.