Foundations

Sorcery

Creatures you control get +3/+3 and gain trample until end of turn. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)

Overrun

Arena

vraska

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

Meowwwww

Sap Your Soul

Kodama is Actually an Ooze

The Unbeatable Squirrel Girl

WItherbloom's Doom

Home

Magic: The Gathering

Starter Commander Decks

Game Night: Free-for-All

The List

Commander Anthology

Planechase Anthology

Conspiracy: Take the Crown

Commander 2015

Tempest Remastered

Duel Decks Anthology: Garruk vs. Liliana

Commander 2014

Planechase 2012

Magic 2012

Salvat 2011

Duels of the Planeswalkers

Duel Decks: Garruk vs. Liliana

Magic 2010

Tenth Edition

Odyssey

World Championship Decks 1999

Anthologies

Tempest

Overrun

Rules Text

Card Facts

Legality

Rulings

Every version

Decks using this card