Song of Creation Turn One Wins

Huge shoutout to e-man4570 for this deckbuilding insight! Adds tons of new six-card winning hands into the mix, which only require three four-ofs (Ritual/Ritual/Beseech) and some luck. Elesh Norn is the best Praetor, but don't miss Irregular Cohort (or other creatures with Changeling) if you're trying to save wildcards.

First game is from before I added Song but it was too good not to show.

(If anyone cares to suggest further refinements to the number of lands vs spells, I will be glad to fine-tune the winrate.)

Decklist
3 Realmbreaker, the Invasion Tree (MOM) 263
1 Channel (STA) 50
1 Mirrex (ONE) 254
4 Once Upon a Time (ELD) 169
1 Urabrask the Hidden (MUL) 88
1 Vorinclex, Voice of Hunger (MUL) 94
4 An Offer You Can't Refuse (SNC) 51
1 Darkslick Shores (ONE) 250
4 Mishra's Bauble (BRR) 34
4 Astral Cornucopia (BRR) 5
4 Bone Saw (BRR) 7
4 Aether Hub (KLR) 279
2 Clearwater Pathway (ZNR) 260
4 Mana Confluence (JOU) 163
4 Karn, the Great Creator (WAR) 1
1 Sheoldred (MOM) 125
4 Briber's Purse (KTK) 217
2 Thran Portal (DMU) 259
4 Dark Ritual (STA) 26
4 Beseech the Mirror (WOE) 82
1 Tendrils of Agony (STA) 34
1 Vorinclex, Monstrous Raider (KHM) 199
1 Song of Creation (IKO) 210

Sideboard
1 Realmbreaker, the Invasion Tree (MOM) 263
1 Wurmcoil Engine (BRR) 63
1 Bonded Construct (J21) 116
1 Metallic Mimic (KLR) 251
1 Urn of Godfire (MOM) 266
1 Chromatic Star (BRR) 11
1 Portal to Phyrexia (BRO) 240
4 Pact of Negation (AKR) 73
4 Leyline of Sanctity (M20) 26