Since they are technically the most expensive Commander in MTG, wed be remiss if we didnt talk about Gwendlyn Di Corci
Both the cards in a vacuum and then also the formats they are legal in

Aang, Destined Savior Admonition Angel Angel of Serenity Anzrag's Rampage Apple of Eden, Isu Relic Ashiok's Erasure Asmodeus the Archfiend Aurelia's Vindicator Aurora Phoenix Avatar Kyoshi, Earthbender Ba Sing Se Badgermole Badgermole Cub Bag of Devouring Bag of Holding Bane Alley Broker Beifong's Bounty Hunters Bitter Work Bottled Cloister Bumi's Feast Lecture Bumi, Eclectic Earthbender Bumi, King of Three Trials Champion of the Clachan Champion of the Path Champion of the Weird Champions of the Perfect Champions of the Shoal Coin of Fate Cold Storage Colfenor's Urn Cosima, God of the Voyage Cracked Earth Technique Dai Li Agents Dai Li Indoctrination Darigaaz Reincarnated Day of the Dragons Deny Reality Detention Sphere Disorder in the Court Earth Kingdom General Earth Rumble Earth Village Ruffians Earthbending Lesson Earthbending Student Earthen Ally Endless Sands Ethereal Forager Etherium-Horn Sorcerer Faceless Butcher Faceless Devourer Fatal Fissure Fiend Hunter Flickerform Gravegouger Gustha's Scepter Haru, Hidden Talent Helvault Hide on the Ceiling Hofri Ghostforge Holistic Wisdom Hypnox Icy Prison Identity Thief Induced Amnesia Ingenuity Engine Journey to Nowhere Leonin Relic-Warder Livio, Oathsworn Sentinel Mechtitan Core Mesmeric Fiend Mimic Vat Mirror of Life Trapping

You may include no more than four copies of any card except basic lands
There are still better cards out there, but the dangerous demon was a sign of things to come in Magic's future
Invasion of Innistrad / Deluge of the Dead Invasion of Innistrad is the black battle card out of March of the Machine , and it doesnt leave you wanting