Duskmourn: House of Horror Commander

Instant

Choose one —
• Exile target player's graveyard.
• Destroy target artifact.
• Each creature deals 1 damage to its controller.

Rakdos Charm

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

Live Tome and Prosper

Diahada

Strain Bravo: [Neuropathic pain] 
​Virulence: 8.5/10
​Pathology: A highly oppressive, symmetrical punisher. This strain attacks the host's central nervous system, turning their natural survival instincts against them. When the host attempts to draw cards, tap mana, or cast efficient spells, the pathogen triggers agonizing feedback loops (Roiling Vortex, Manabarbs, Spellshock).

Neurotoxin

​Strain Echo - [Mucormycosis]
Virulenance: 6.5/10
Pathology: A highly resilient fungal overgrowth. It possessed excellent resource-conversion metrics but a lethargic incubation period. It required 4 to 6 replication cycles to achieve lethality—too slow for the current meta-environment.

Fungus

Flaming Carnage

Which Niv

Source: https://magic.wizards.com/en/news/announcements/edge-of-eternities-commander-decklists

Rakdos Charm

Rules Text

Card Facts

Legality

Rulings

Every version

Decks using this card