Secret Lair Drop

Artifact

Rakdos Signet

Gev's Deck Factory

Source: https://magic.wizards.com/en/news/announcements/reality-fracture-multiverse-reforged-commander-decklist

Multiverse Reforged Preconstructed Commander Deck

This is the actual decklist that I own.
Draft the Commanders first from a special pool (in the sideboard) with 4 packs of 10 or 12.
Each commander has partner. If you want to use one of the companions, you can do that as well if you abide by the companion rules and color identity rules. For Umori specifically, you may still have creatures as your commanders as long as the rest of the deck follows its companion rules.
I suggest choosing your commanders (and sometimes a companion) before you've drafted from the main pool. 
Each player automatically gets a command tower and an arcane signet.
Before drafting, players can decide if they want to draft 60 card commander decks or full-sized 100 card decks.
Draft 4 packs of 14 for 60 card decks and 6 or 7 packs of 14 for 100 card decks.
Color Identity does not matter when it comes to lands.
Draft Archetypes:
Reanimator
Cast spell, get value
Freecasting
Theft
Copying spells
Value for targeting your own creatures

(The Real) Budget Spellslinger Commander Cube

Nissa Hates Green

Live Tome and Prosper

Elden ring

Eldenr ring

Diahada

Home

Magic: The Gathering

Reality Fracture Commander

Arena Anthology 1

Duskmourn: House of Horror Commander

Outlaws of Thunder Junction Commander

Ravnica: Clue Edition

Ravnica Remastered

The Lost Caverns of Ixalan Commander

Starter Commander Decks

The Brothers' War Commander

New Capenna Commander

Crimson Vow Commander

Forgotten Realms Commander

Commander 2020

RNA Guild Kit

Commander 2017

Commander Anthology

Modern Masters 2017

Commander 2016

Commander 2011

Magic Online Theme Decks

Archenemy

Dissension

Magic Online Promos

Rakdos Signet

Rules Text

Card Facts

Legality

Rulings

Every version

Decks using this card