Core Set 2021

Instant

As an additional cost to cast this spell, discard a card.
Draw two cards.

Thrill of Possibility

Niv-Mizzet, Parun

Source: https://magic.wizards.com/en/news/announcements/foundations-commander-decklists

Reign of Dragons Foundations Preconstructed Commander Deck

Booster Draft picks from Phyrexia: All Will Be One

Booster Draft Deck - Phyrexia: All Will Be One

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

Prismari Be Slangin’ It

Gandalf

Copy The Copy of the Copy

GARDIEN DES ENFERS

Home

Magic: The Gathering

Marvel Universe

Through the Omenpaths Bonus Sheet

Foundations Commander

Foundations

Tales of Middle-earth Commander

Phyrexia: All Will Be One

Jumpstart 2022

Dominaria United Commander

Dominaria United

Strixhaven Mystical Archive

The List

Theros Beyond Death

Secret Lair Drop

Throne of Eldraine

Thrill of Possibility

Rules Text

Card Facts

Legality

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Every version

Decks using this card