These force your opponent to discard a card from their hand, and while this might not appear all that powerful at first glance, repeatedly forcing your opponent to discard cards or being able to choose a specific card from your opponent's makes discard effects worthwhile
Whatnot is stronger for live selling, community building, quick auctions, and moving lower-to-mid-value inventory fast
Warehouse Krark's Thumb Krark, the Thumbless Mana Clash Mana Crypt Mana Screw Mijae Djinn Mirror March Mirrored Depths Mogg Assassin Molten Birth Molten Sentry Mutalith Vortex Beast Negative Zone Portal Odds // Ends Odds // Ends Okaun, Eye of Chaos Orcish Captain Planar Chaos Plasma Caster Pokey, the Scallywagg (playtest) Puppet's Verdict Rakdos, the Showstopper Ral Zarek Ral, Monsoon Mage Risky Move Scoria Wurm Setzer, Wandering Gambler Skittish Valesk Skyclaw Thrash Sorcerer's Strongbox Squee's Revenge Stitch in Time Tavern Scoundrel Tavern Swindler The Gold Saucer Tide of War Unleash the Flux
There are more than enough equip synergy cards in white to make this deck viable and, indeed, remarkably strong
The reason it got shot down (by Brady Dommermuth, the man in charge of the creative team at the time) was that it was a plan where we were essentially building three completely different worlds and Brady was worried the creative team wouldn't be able to do it with the resources available