Nightmares by GuiMassari

Format: Commander

Commander: Umbris, Fear Manifest

Bracket: 2

DeckCheck Threat Index: 28

Deck overview

This Dimir deck uses Umbris, Fear Manifest to convert Horror and Nightmare tribal synergy into an aggressive exile and mill strategy. The primary game plan accelerates into a Turn 4 Umbris, followed by mass exile spells like Tasha's Hideous Laughter and blink effects such as Ghostly Flicker that rapidly inflate Umbris's power. Once Umbris reaches lethal commander damage on Turn 6, it eliminates opponents sequentially over three combat turns. A secondary mill and reanimation subtheme powered by Captain N'ghathrod, Consuming Aberration, and The Mindskinner provides robust backup pressure. The deck features strong reactive disruption with Toxic Deluge and counterspells, alongside persistent graveyard hate from Leyline of the Void. However, its reliance on combat damage without built-in evasion or haste leaves it vulnerable to targeted removal across multiple response cycles.

Decklist (100 cards)

• 1 Aboleth Spawn
• 1 Ancient Cellarspawn
• 1 Arcane Signet
• 1 Archenemy's Charm
• 1 Arvinox, the Mind Flail
• 1 Ashiok, Dream Render
• 1 Ashiok, Nightmare Weaver
• 1 Ashiok, Sculptor of Fears
• 1 Bojuka Bog
• 1 Cabal Coffers
• 1 Call of the Nightwing
• 1 Captain N'ghathrod
• 1 Choked Estuary
• 1 Clearwater Pathway // Murkwater Pathway
• 1 Command Beacon
• 1 Command Tower
• 1 Conjurer's Closet
• 1 Consuming Aberration
• 1 Contaminated Aquifer
• 1 Countersquall
• 1 Court of Cunning
• 1 Cunning Rhetoric
• 1 Darkwater Catacombs
• 1 Didn't Say Please
• 1 Dimir Aqueduct
• 1 Dimir Signet
• 1 Displace
• 1 Distant Melody
• 1 Drown in Dreams
• 1 Drowned Catacomb
• 1 Elder Brain
• 1 Endless Evil
• 1 Essence Flux
• 1 Fabled Passage
• 1 Feed the Swarm
• 1 Fractured Sanity
• 1 Geier Reach Sanitarium
• 1 Ghostly Flicker
• 1 Glimpse the Unthinkable
• 1 Gloomlake Verge
• 1 Gravestorm
• 1 Grazilaxx, Illithid Scholar
• 1 Grell Philosopher
• 1 Infernal Grasp
• 1 Intellect Devourer
• 3 Island
• 1 Jidoor, Aristocratic Capital // Overture
• 1 Leyline of the Void
• 1 Maddening Cacophony
• 1 Morphic Pool
• 1 Mystic Sanctuary
• 1 Negate
• 1 Nemesis of Reason
• 1 Nephalia Drownyard
• 1 Nightmare Unmaking
• 1 Otawara, Soaring City
• 1 Overlord of the Balemurk
• 1 Path of Ancestry
• 1 Phyrexian Obliterator
• 1 Phyrexian Revoker
• 1 Planar Incision
• 1 Polluted Delta
• 1 Psychic Corrosion
• 1 Ravenous Chupacabra
• 1 Reality Shift
• 1 Reflections of Littjara
• 1 Reliquary Tower
• 1 Silent Hallcreeper
• 1 Singularity Rupture
• 1 Sludge Monster
• 1 Sol Ring
• 1 Spellskite
• 1 Sunken Hollow
• 1 Sunken Ruins
• 2 Swamp
• 1 Tainted Isle
• 1 Takenuma, Abandoned Mire
• 1 Talisman of Dominance
• 1 Tasha's Hideous Laughter
• 1 Teferi's Time Twist
• 1 Temple of Deceit
• 1 The Darkness Crystal
• 1 The Mindskinner
• 1 The Water Crystal
• 1 Thing in the Ice // Awoken Horror
• 1 Thought Vessel
• 1 Three Tree City
• 1 Toxic Deluge
• 1 Umbris, Fear Manifest
• 1 Undercity Sewers
• 1 Underground River
• 1 Urborg, Tomb of Yawgmoth
• 1 Watery Grave
• 1 Web of Inertia
• 1 Wharf Infiltrator
• 1 Yarok's Fenlurker
• 1 Zellix, Sanity Flayer