Weaken Opponent

Weaken Opponent (Visual)

Hoser cards, bent more towards creatures and less towards pillow forting.
"Opponent can't" cards (can't gain life, can't tutor, etc.)
Detain
Archetype creatures (remove keywords)
Skip steps/phases
Shrink opponent's creatures
The partner generals are just for the colors; anything would work here.

Click here for a text version of this decklist
Click here for my EDH Commander decks

General (2):
Silas Renn, Seeker Adept Akiri, Line-Slinger

Creatures (34):
Void Winnower Watchdog Archon of the Triumvirate Gwafa Hazid, Profiteer Haunter of Nightveil Kaervek the Merciless Kambal, Consul of Allocation Kulrath Knight Lavinia of the Tenth New Prahv Guildmage Notion Thief Sen Triplets The Scorpion God Vish Kal, Blood Arbiter Archetype of Finality Erebos, God of the Dead Massacre Wurm Ob Nixilis, Unshackled Smog Elemental Archetype of Imagination Brine Elemental Fatespinner Teferi, Mage of Zhalfir Archetype of Aggression Urabrask the Hidden Angelic Arbiter Archetype of Courage Aven Mindcensor Blinding Angel Elesh Norn, Grand Cenobite Grand Abolisher Iona, Shield of Emeria Linvala, Keeper of Silence Yosei, the Morning Star

Spells (16):
Contagion Engine Phyrexian Splicer Ward of Bones Everlasting Torment Rain of Gore Teferi's Moat Liliana, Death Wielder Painful Quandary Sudden Spoiling Dismiss into Dream Jace, Unraveler of Secrets Polymorphist's Jest Leyline of Punishment Stranglehold Martial Law Overwhelming Splendor

Mana Acceleration (12):
Cryptolith Fragment Commander's Sphere Gilded Lotus Hierophant's Chalice Jeskai Banner Mardu Banner Meteorite Prismatic Geoscope Unstable Obelisk Vessel of Endless Rest Grand Arbiter Augustin IV Tezzeret the Schemer

Lands (36):
Underground Sea Badlands Tundra Scrubland Volcanic Island Plateau Watery Grave Blood Crypt Hallowed Fountain Godless Shrine Steam Vents Sacred Foundry Sunken Ruins Graven Cairns Mystic Gate Fetid Heath Cascade Bluffs Rugged Prairie Crumbling Necropolis Arcane Sanctum Nomad Outpost Mystic Monastery Command Tower Path of Ancestry Reflecting Pool Spinerock Knoll Windbrisk Heights Swamp Swamp Island Island Mountain Mountain Plains Plains Sol Ring