Notable Cards Aminatou, the Fateshifter is a popular Esper blink commander, in large part because of its infinite combo with Felidar Guardian

Acererak the Archlich Balthor the Defiled Belbe, Corrupted Observer Bladewing the Risen Boris Devilboon Daxos the Returned Dee Kay, Finder of the Lost Dralnu, Lich Lord Ebondeath, Dracolich Geth, Lord of the Vault Geth, Thane of Contracts Glissa Sunslayer Glissa, Herald of Predation Glissa, the Traitor God-Eternal Bontu God-Eternal Kefnet God-Eternal Oketra God-Eternal Rhonas Gorex, the Tombshell Grimgrin, Corpse-Born Grusilda, Monster Masher Haakon, Stromgald Scourge Hancock, Ghoulish Mayor Hashaton, Scarab's Fist Jarad, Golgari Lich Lord Jason Bright, Glowing Prophet Josu Vess, Lich Knight Korlash, Heir to Blackblade Kotis, Sibsig Champion Kotis, the Fangkeeper Kraum, Ludevic's Opus Kraum, Ludevic's Opus Kraum, Violent Cacophony Lord of Tresserhorn Mikaeus, the Unhallowed Narfi, Betrayer King Neheb, Dreadhorde Champion Neheb, the Eternal Nekusar, the Mindrazer Nevinyrral, Urborg Tyrant Olag, Ludevic's Hubris Polukranos, Unchained Ratadrabik of Urborg Raul, Trouble Shooter Sedris, the Traitor King Sidisi, Regent of the Mire Sidisi, Undead Vizier Skullbriar, the Walking Grave Storrev, Devkarin Lich Temmet, Naktamun's Will Thraximundar Tormod, the Desecrator Tymaret, the Murder King Varina, Lich Queen Venser, Corpse Puppet Vogar, Necropolis Tyrant Wilhelt, the Rotcleaver Zahur, Glory's Past Zul Ashur, Lich Lord

3) You have to maintain a spreadsheet It's absolutely vital at all times to know which Rares you already have 4 of
open on your turn
The thinness of the card will often be the biggest giveaway, and fakes will feel flimsy and can bend much farther than an authentic card before creasing
Ever since I saw how many creatures in this Universes Beyond MTG set had the typeline 'Spider Human Hero' I've been nearly giddy with anticipation for this moment