Your opponent can't attack
If your opponents have creatures with reach or flying , your board wipes will take care of those to keep the battlefield free from blockers
At some point, I saw and built a Grixis Dragonstorm Commander deck with cheap ramp spells, tutors, and fast mana to build up into a large Dragonstorm, and swing for the win with hasty dragons thanks to Dragonlord Kolaghan or a convoluted combo involving Worldgorger Dragon and Animate Dead, making it one of the funniest decks Ive ever played with
Replenish Sorcery Return all enchantment cards from your graveyard to play
You have a store selected on your map, and you've filled your pack with everything you'll need
The rewards are usually better than the normal Battle Pass, and you can unlock Bundles, Credits, Crystals, Accessories, Packs, and more