MTGs Reserved List is a curated collection of some of the most powerful cards in all of Magics history

Archaeomancer's Map Archdruid's Charm Axgard Armory Bad River Bant Panorama Black Chocobo Bloodstained Mire Bog Glider Borderland Explorer Borderland Ranger Boseiju Reaches Skyward Caravan Vigil Case of the Shattered Pact Centaur Rootcaster Civic Wayfinder Crop Rotation Cultivate Deep Reconnaissance Diligent Farmhand District Guide Double Play Dreamscape Artist Druid of the Emerald Grove Ecologist's Terrarium Edge of Autumn Elemental Teachings Esper Panorama Eternal Dominion Exploding Borders Explosive Vegetation Far Wanderings Farfinder Farhaven Elf Flare of Cultivation Flood Plain Flooded Strand Frenzied Tilling Gaea's Balance Gatecreeper Vine Ghost Quarter Grasslands Grave Upheaval Grixis Panorama Harrow Hired Giant Horizon Spellbomb Huatli, Poet of Unity Into the North Jund Panorama Jungle Wayfinder Knight of the Reliquary Kodama's Reach Krosan Verge Land Aid '04 Landscaper Colos Migratory Greathorn Mountain Valley Mwonvuli Acid-Moss Mycosynth Wellspring Natural Balance Nature's Lore Navigation Orb Naya Panorama New Frontiers Nissa, Vastwood Seer Oath of Lieges One with Nature Orchard Strider Outcaster Greenblade Path to Exile Path to the World Tree Peregrination

Instead, it provides an alternate win condition for players to secure a victory with
Tocasias Welcome White has slowly been accumulating card draw options over the past few years, and at the time of publication, I think white can draw a reasonable amount of cards especially if it can chain the right engines together (looking at you, Skullclamp)
With that said, I think it is important to have an idea of how the process works
It also gives them time to draw into the next Revelation