Main Deck Tech: Utilizes Fires of Invention(Fries) to setup for powerful turns casting two threats per turn, or casting a threat and answering an opposing one. This gets even better with another new addition from Eldraine, Fae of Wishes. We're able to pull unique answers from the sideboard such as Casualties of War, Ashiok, Dream Render, Unmoored Ego, and Kaya's Wrath because Fires of Invention opens up other colors! Normally we win through Nicol Bolas, Dragon-God -8(easier to setup thanks to Planewide Celebration) or through Chandra, Awakened Inferno damage. Castle Vantress allows us to mana dump and setup scrys during the upkeep giving us a better card to cast and renewing our pass for the value train. We include various answers to both planeswalkers and creatures such as Angrath's Rampage and Bedevil to make sideboarding versus control easier; this entails not having to sideboard out more than Legion's End when facing creatureless control. 

Sideboard Tech: So, most of this section will cover what to grab with Fae of Wishes and what to actually "sideboard" between games. During 99% of your sideboarding phases, 0 cards will be brought in. I repeat, 99% of the time, no cards will be brought in. This is mainly because we want most of the cards to stay fetchable by Fae of Wishes. The Wanderer solves the Wicked Wolf problem while dodging Veil of Summer. It's also super funny with Command the Dreadhorde. 

Esper Stax is part of the 1%. During this matchup you'll sideboard like this: 

-1 Fires of Invention

-2 Legion's End

-3 Ritual of Soot

+1 Chandra, Awakened Inferno

+1 The Elderspell or Command the Dreadhorde

+2 Ashiok, Dream Render

+2 Unmoored Ego

The idea here is to weaken the opponent's Unmoored Ego. Bringing in an extra Chandra, Awakened Inferno and sideboarding out one of your Fires of Invention allows you to wish for Fires of Invention later while also adding a threat. Ashiok, Dream Render exiles their graveyard making it impossible to recur artifacts and enchantments, and enables mill as a win-con. Unmoored Ego allows us to remove their Doom Foretold or Dance of the Manse. Usually Dance is the first target, but Doom Foretold can ruin a game. Normally it prevents us setting up Fires of Invention or a Planeswalker because we'd have to sacrfice it before gaining any value. Thought Erasure their first Doom Foretold,Dance of the Manse, or Thought Erasure, and we should be good to go!

Field of the Dead/Golos is the other 1%:

-2 Ritual of Soot

-2 Angrath's Rampage

+2 Unmoored Ego

+2 Ashiok, Dream Render

Angrath's Rampage is weak against Tamiyo, Collector of Tales, and we can always grab Ritual of Soot from the sideboard with Fae to answer a huge board. Or, if we have Fires of Invention out, we can simply grab Kaya's Wrath. Sideboarding out the Angrath's Rampage also allows us to wish for it as well. If they have two or less Field of the Dead this is normally the go to target for Unmoored Ego. This is situational, and will have to be felt out. Sometimes it's better to name Hydroid Krasis or Golos. Casualties of War can answer one Field of the Dead, but usually it's quite hard to come back from a swarm of respawing zombies. 

Reanimator is the other other 1% in which we actually sideboard:

-2 Ritual of Soot

-2 Legion's End

-1 Fires of Invention

+1 Chandra, Awakened Inferno

+2 Ashiok, Dream Render

+2 Unmoored Ego

As always, we leave a copy each of Ashiok, Dream Render and Unmoored Ego so we can wish for it with Fae of Wishes. We also board out a Fires of Invention to keep it safe from the opponent's potential Unmoored Ego. First Unmoored Ego Target = Agent of Treachery. Then target whatever else we see as a threat after looking through their deck.