This is only possible through the game's recently introduced trading mechanic, as these sellers are simply asking to exchange friend codes with the buyers and then sending a card over
Just taking out any early play is great for control and the various other control cards they will have enable this to scale somewhat better
It could be strong in the right deck, but Id want like 4+ White Mage's Staffs + several other enablers

GET ALL 4 BLOOMBURROW COMMANDER DECKSMake trash and smash with Animated Army, make offspring and go wide with Family Matters, make friends and then end them with Peace Offering, or hoard tokens to defeat your enemies with an army of squirrels with Squirreled Away EPIC MULTIPLAYER BATTLESCommander is a multiplayer way to play Magic, an epic, free-for-all battle full of strategic plays and social intrigue INTRODUCING 40 COMMANDER CARDSEach deck introduces 10 never-before-seen Commander cards to Magic: The Gathering, including 3 foil cards (one of which is Borderless.) COLLECT SPECIAL TREATMENT CARDSEach deck also comes with a 2-card Collector Booster Sample Pack containing 2 cards from the Bloomburrow set, including 1 alt-border Rare or Mythic Rare and at least 1 Traditional Foil card Table of Contents show All About Bloomburrow Commander Arthur, Marigold Knight | Illustration by Steven Belledin What Is Bloomburrow Commander

Gwynn SAR 117/081 Trainer SARs can become major chase cards, especially when the character, artwork, and rarity all line up
I've got a buddy who runs Shanna, and once that deck hits the late game, trying to stop it is nigh impossible