silver border mtg cards Black Border, White Border, - What Do They… Silver Border (Visual)

Cards like Storm herd can be played cheaply by reducing your cost with your commander, or can be exiled from the top of your deck spawning a ton of dragon cards

Can You Play Blind Obedience in Mono-White Commander

You were probably subconsciously influenced by Cosmic Encounter

Alexander Gregory Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp

Almost all of them have their niche in Standard

Reforge the Soul Time Ebb Write into Being Land: 14 Island 7 Mountain Bonders Enclave Desolate Lighthouse Forge of Heroes Forgotten Cave Hall of Oracles Lonely Sandbar Reliquary Tower Remote Isle Rivendell Rogues Passage Shivan Reef Smoldering Crater Steam Vents Sulfur Falls Temple of Epiphany Tyrite Sanctum Life, Backwards Without some form of deck manipulation, Rivers first ability isnt much different from normal card draw through a randomized deck, except your top deck is physically safe from mill