Yes, you can play Urborg, Tomb of Yawgmoth in your mono-white Commander decks
Phantom Nishoba Loxodon Hierarch Nazahn, Revered Bladesmith Qasali Pridemage Saffi Eriksdotter Mystic Enforcer Knight of the Reliquary Fleetfoot Panther Gaddock Teeg Voice of Resurgence Rhys the Redeemed Tolsimir Wolfblood Wilt-Leaf Liege Sigarda, Host of Herons Sigarda, Heron's Grace Selvala, Explorer Returned Selesnya Guildmage Renegade Rallier Armada Wurm Captain Sisay Centaur Healer Dauntless Escort Dromoka, the Eternal Dragonlord Dromoka Enlisted Wurm Fleecemane Lion Karametra, God of Harvests Kitchen Finks Loxodon Smiter Mirri, Weatherlight Duelist Novablast Wurm Holy crap
Classic Civic Wayfinder in a constructed playable form
That's a lot of mana, particularly without the help of the older cards to help facilitate your plans
If your opponent has no answer for flying then it's an easy game over
5 Tergrid, God Of Fright I Wish I Had A Hand Tergrid in the 99 of a Commander deck already sucks to play against, so when I see it as a commander, I can't help but mentally groan