Just a general tip, but before sorting for a buylist, have a general idea of how low a value you want to pick for

Creatures (23) 1 Amoeboid Changeling 1 Mirror Entity 1 Taurean Mauler 1 Samut, Voice of Dissent 1 Spark Double 1 Changeling Outcast 1 Valiant Changeling 1 Irregular Cohort 1 Kenrith, the Returned King 1 General Kudro of Drannith 1 Rin and Seri, Inseparable 1 Kamahl, Heart of Krosa 1 Realmwalker 1 Masked Vandal 1 Bloodline Pretender 1 Adeline, Resplendent Cathar 1 Katilda, Dawnhart Prime 1 Kyler, Sigardian Emissary 1 Jirina, Dauntless General 1 Aragorn, the Uniter 1 Eowyn, Shieldmaiden 1 Beregond of the Guard 1 Greymond, Avacyn's Stalwart Lands (36) 1 Forbidden Orchard 4 Snow-Covered Plains 4 Snow-Covered Mountain 4 Snow-Covered Island 4 Snow-Covered Forest 4 Snow-Covered Swamp 1 Dark Depths 1 Mutavault 1 Evolving Wilds 1 Command Tower 1 Alpine Meadow 1 Arctic Treeline 1 Glacial Floodplain 1 Highland Forest 1 Ice Tunnel 1 Rimewood Falls 1 Snowfield Sinkhole 1 Volatile Fjord 1 Woodland Chasm 1 Faceless Haven 1 Shimmerdrift Vale Spells (40) 1 Sol Ring 1 Conspiracy 1 Kodama's Reach 1 Wayfarer's Bauble 1 Peer Pressure 1 Winter's Night 1 Winter's Chill 1 Glacial Crevasses 1 Voidslime 1 Into the North 1 Rime Transfusion 1 Crib Swap 1 Path to Exile 1 Banefire 1 Rite of Replication 1 Swiftfoot Boots 1 Mass Appeal 1 Clone Legion 1 Chandra's Ignition 1 Smuggler's Copter 1 Unbreakable Formation 1 On Thin Ice 1 Marit Lage's Slumber 1 Arcane Signet 1 Dire Tactics 1 Sanctuary Lockdown 1 Reflections of Littjara 1 Replicating Ring 1 Maskwood Nexus 1 Moritte of the Frost 1 Search for Glory 1 Blizzard Brawl 1 Glittering Frost 1 Mystic Reflection 1 Blood on the Snow 1 Crippling Fear 1 Out of Time 1 Grafted Identity 1 Farewell 1 Folk Hero Move over, Bloomburrow summer, its time for Duskmourn fall

Azlask, the Swelling Scourge Azlask, the Swelling Scourge is a dangerous Eldrazi commander, and perhaps the best annihilator card in the game
Urborg, Tomb of Yawgmoth is a land that does just one thing, turn all lands into play into Swamps, including itself
He is certainly not unplayable, but stopping life gain is not that big an impact on the game, paying two life and two mana for an extra card is nowhere near as good as Underworld Connections, and that leaves us needing to consistently get the body to make him worth it