So, while most of the interesting aspects of Zombie Infestation Dredge proved to be not quite good enough, the short-lived brew can claim a lasting impact on Modern Dredge thanks to its addition of the flashback burn spell
That makes it scary in both Commander and Standard
Tap The Beamtown Bullies: Target opponent whose turn it is puts target nonlegendary creature card from your graveyard onto the battlefield under their control
If Mewtwo is part of your collection, treat it accordingly.

Arguel's Blood Fast Bandit's Talent Black Market Connections Braids's Frightful Return Braska's Final Aeon Call of the Ring Chains of Mephistopheles Coercive Impetus Construct a Cosmic Cube Dark Prophecy Demonic Covenant Demonic Lore Discreet Retreat Dockside Chef Echo of Death's Wail Elspeth's Nightmare Erebos, Bleak-Hearted Erebos, God of the Dead Forbidden Crypt Gravestorm Greed Greed's Gambit Grisly Transformation Hateful Eidolon Infernal Scarring Infernal Tribute Krovikan Fetish Krovikan Plague Lich Lich's Mastery Lithoform Blight Lord Skitter's Blessing Midnight Oil Mindless Conscription Mornsong Aria Necrodominance Necromancer's Stockpile Necropotence Nihilistic Glee Null Profusion Oath of Lim-Dl Obsessive Pursuit One Ring to Rule Them All Origin of Black Widow Out of the Tombs Phyrexian Arena Phyrexian Etchings Raiders' Spoils Robot Domination Rune of Mortality Scavenged Weaponry Scion of Halaster Scourgemark Sicken Soulreaper of Mogis Summon: Anima Tainted Well Teval's Judgment The Cloning of Shredder The Creation of Avacyn The Cruelty of Gix The Death of Gwen Stacy The Eldest Reborn The House Grows Hungry The Long Reach of Night The Revelations of Ezio The Rise of Sozin The Toymaker's Trap Tymaret Calls the Dead Underworld Connections Vampiric Rites Vampirism

The first is cards like Spawn of Mayhem, Psychosis Crawler, or Twilight Prophet which will automatically deal damage to your opponents at the start of your turn