The most likely turn-one win in Historic using Chaos Warp (as of Brothers' War). Turn-one Grapeshot win is easier to achieve, but less fun. Surprisingly, I was not able to find a way to use the new card One with the Multiverse to make the deck more consistent. This took about 250 hands to achieve. Sideboard is an attempt to win a second game "fairly" by ramping to Omniscience, because why not.
Deck
4 Chaos Warp (STA) 36
2 Scheming Symmetry (M20) 113
4 Omniscience (M19) 65
4 Fragment Reality (Y22) 4
4 Sacred Foundry (GRN) 254
1 Mastermind's Acquisition (RIX) 77
2 Leyline of Abundance (M20) 179
4 Needleverge Pathway (ZNR) 263
2 Leyline of Combustion (M20) 148
2 Leyline of Anticipation (M20) 64
3 Leyline of Sanctity (M20) 26
4 Bolas's Citadel (WAR) 79
1 Final Parting (DAR) 93
1 Tainted Pact (STA) 33
4 Emergent Ultimatum (IKO) 185
4 Phyrexian Tower (JMP) 493
3 Inspiring Vantage (KLR) 283
1 Azusa, Lost but Seeking (M21) 173
4 Aether Hub (KLR) 279
1 Leyline of the Void (M20) 107
1 Cragcrown Pathway (ZNR) 261
1 Branchloft Pathway (ZNR) 258
3 Battlefield Forge (BRO) 257
Sideboard
3 Circuitous Route (GRN) 125
4 Golgari Guildgate (GRN) 248
2 Bala Ged Recovery (ZNR) 180
1 Circuitous Route (GRN) 125
4 Simic Guildgate (RNA) 258
1 Tendrils of Agony (STA) 34
