halloween mtg commander deck Manifest: The Final Hunt – Custom Horror-Themed Picking The Best Horror-Themed Commander

Leinore is particularly noteworthy for her Coven ability

Withstand therplasm Crystal Seer Drowned Rusalka Frazzle Gigadrowse Hatching Plans Infiltrator's Magemark Leyline of Singularity Mimeofacture Quicken Repeal Runeboggle Sky Swallower Steamcore Weird Stratozeppelid Thunderheads Torch Drake Train of Thought Vacuumelt Vedalken Plotter Vertigo Spawn Abyssal Nocturnus Caustic Rain Cremate Cry of Contrition Cryptwailing Daggerclaw Imp Douse in Gloom Exhumer Thrull Hissing Miasma Leyline of the Void Necromancer's Magemark Orzhov Euthanist Ostiary Thrull Plagued Rusalka Poisonbelly Ogre Restless Bones Revenant Patriarch Sanguine Praetor Seize the Soul Skeletal Vampire Smogsteed Rider Bloodscale Prowler Fencer's Magemark Ghor-Clan Bloodscale Hypervolt Grasp Leyline of Lightning Living Inferno Ogre Savant Parallectric Feedback Pyromatics

Elspeth Conquers Death Elspeth Conquers Death might be my favorite saga of all time

You can even couple it with a board wipe to your opponent and they get milled for as many cards as you destroyed