You may return any non-Avatar creature card or any planeswalker card from your graveyard to your hand with Overlord of the Balemurk's last ability, not just one you milled while resolving that ability
The moon sits perfectly in the center of the picture as it sheds light on to arbok targeting its prey
Whenever Acererak the Archlich attacks, create a number of 2/2 black Zombie creature tokens equal to the number of opponents you have
Admittedly, Abstergo Entertainment is probably too costly for a cEDH deck
Aethersquall Ancient Archipelagore Breaching Leviathan Charix, the Raging Isle Eater of Days Famished Worldsire Glacier Godmaw Grozoth Inkwell Leviathan Jokulmorder Kederekt Leviathan Kiora's Dambreaker Leviathan Nemesis of Reason Nimbus Swimmer Pearl Lake Ancient Segovian Leviathan Simic Sky Swallower Sin, Spira's Punishment Sin, Unending Cataclysm Sky Swallower Slinn Voda, the Rising Deep Starwinder Stormtide Leviathan Summon: Leviathan Thing from the Deep Trench Gorger Xyris, the Writhing Storm
You can play Archenemy in Commander easily
