Commander Masters

Artifact

{T}: Add one mana of any color.
{4}, {T}: Each player who controls a permanent named Bonder's Ornament draws a card.

Bonder's Ornament

Commander Cube

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

Symbiotic Swarm (Commander 2020 Preconstructed Deck)

Arcane Maelstrom (Commander 2020 Preconstructed Deck)

Ruthless Regiment (Commander 2020 Preconstructed Deck)

Timeless Wisdom (Commander 2020 Preconstructed Deck)

Enhanced Evolution (Commander 2020 Preconstructed Deck)

Valgavoth Demon/Nightmare Tribal

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Commander 2020

Bonder's Ornament

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