With Sigarda out, that no longer becomes an option, reducing your opponents to board wipes of some kind, which arent always great in many scenarios
Most Commander decks on eBay are loaded with low-quality filler cards to keep costs down, which comes at the expense of power, performance, and ultimately fun
Surgical Extraction (and other fast graveyard hate) shuts down half of the deck (the Goryo's Vengeance reanimation plan), while discard can help make sure you don't get janked out by Through the Breach putting something massive in hand
The FNM-treatment cards from the Universal promo pack are numbered #398-402
Creature Artifact - Shapeshifter Color tag templates(None) Pack Leader Other Dogs you control get +1/+1
The best MTG Arena decks in white are usually aiming to finish the game fast and don't need a big top-end - but Commander decks always need some MTG Mana Ramp to come out on top