Weaken Creature

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These are effects that make your opponents' creatures worse. Some of these cards make your own creatures worse too (global creature "de-buffing").
For other ways to prevent damage from creatures, see also my Tap (Icy), Damage Prevention, and Pillow Fort pages.
I also put some other "Weaken" categories here as well.
• Weaken Creature
• Weaken Artifact
• Weaken Land
• Weaken (miscellaneous)
 
Weaken Creature: 1 Ascendant Evincar Weaken Artifact: Weaken (miscellaneous):
1 Overwhelming Splendor 1 Bane of the Living 1 Karn, the Great Creator 1 Angel of Jubilation
1 Contagion Engine 1 Carnifex Demon 1 Damping Matrix 1 Forsaken Wastes
1 Massacre Wurm 1 Death Match 1 Null Rod 1 Opposition Agent
1 Gravitational Shift 1 Death Pits of Rath 1 Collector Ouphe 1 Brine Elemental
1 Elesh Norn, Grand Cenobite 1 Harbinger of Night 1 Stony Silence 1 Leyline of Singularity
1 Norn's Annex 1 Havoc Demon 1 Haunting Wind 1 Teferi, Mage of Zhalfir
1 Silent Arbiter 1 Kagemaro, First to Suffer 1 Titania's Song 1 City of Solitude
1 Dueling Grounds 1 Midnight Banshee 1 Oko, Thief of Crowns 1 Leyline of Punishment
1 Order // Chaos 1 Mutilate 1 Disruption Aura 1 Stranglehold
1 Teferi's Moat 1 Stronghold Overseer 1 Energy Flux 1 Aven Mindcensor
1 Cursed Totem 1 Damping Matrix 1 Kataki, War's Wage 1 Faith's Fetters
1 Black Sun's Zenith 1 Sorceress Queen 1 Ayesha Tanaka 1 Oriss, Samite Guardian
1 Phyrexian Plaguelord 1 Serendib Sorcerer 1 Encrust 1 Immovable Rod
1 Sudden Spoiling 1 Dampening Pulse 1 Brown Ouphe 1 Minimus Containment
1 Propaganda 1 Cumber Stone 1 Ouphe Vandals 1 Lyev Skyknight
1 War Tax 1 Ixidron 1 Rust 1 New Prahv Guildmage
1 Bedlam 1 Mystic Decree 1 Stasis Cocoon 1 Archon of the Triumvirate
1 Urabrask the Hidden 1 Stormtide Leviathan 1 Artifact Possession 1 Cursed Rack
1 Ghostly Prison 1 Elephant Grass 1 Relic Bind 1 Gnat Miser
1 Linvala, Keeper of Silence 1 Katabatic Winds 1 Powerleech 1 Locust Miser
1 Moat 1 Singing Tree   1 Jin-Gitaxias, Core Augur
1 Orim's Chant 1 Caverns of Despair Weaken Land: 1 Notion Thief
1 Sphere of Safety 1 Chaosphere 1 Back to Basics 1 Spirit of the Labyrinth
1 Illness in the Ranks 1 Eunuchs' Intrigues 1 Blood Moon 1 Eidolon of Rhetoric
1 Smog Elemental 1 Flowstone Slide 1 Blood Sun 1 Song of the Dryads
1 Mark for Death 1 Goblin War Cry 1 Mana Web 1 Leovold, Emissary of Trest
1 Boros Battleshaper 1 Gravity Sphere 1 Relic Putrescence 1 Conqueror's Flail
1 Haunter of Nightveil 1 Heat Wave 1 Contamination 1 Solemnity
1 Korozda Gorgon 1 Raging River 1 Infernal Darkness 1 Hope of Ghirapur
1 Dismiss into Dream 1 Smoke 1 Naked Singularity 1 Imprisoned in the Moon
1 Toxic Deluge 1 War Cadence 1 Reality Twist 1 Yixlid Jailer
1 Mystic Barrier 1 Wave of Indifference 1 Land Equilibrium 1 Ashiok, Dream Render
1 Doomwake Giant 1 Change of Heart 1 Hall of Gemstone 1 Kaya, Bane of the Dead
1 Polymorphist's Jest 1 Crovax, Ascendant Hero 1 Pale Moon 1 Teferi, Time Raveler
1 Hushwing Gryff 1 Humble 1 Ritual of Subdual 1 Tibalt, Rakish Instigator
1 Arcane Lighthouse 1 Humility 1 Polluted Bonds 1 Sen Triplets
1 Retribution of the Ancients 1 Magus of the Moat 1 Thoughtleech 1 Phyrexian Revoker
1 Orc Sureshot 1 Peacekeeper 1 Vorinclex, Voice of Hunger 1 Pithing Needle
1 Archangel of Tithes 1 Stonehorn Dignitary 1 War's Toll 1 Sorcerous Spyglass
1 Bonds of Mortality 1 Ensnaring Bridge 1 Shattered Angel 1 Voidstone Gargoyle
1 Sandwurm Convergence 1 Engineered Plague 1 Nature's Wrath 1 Ashes of the Abhorrent
1 Island of Wak-Wak 1 Night of Souls' Betrayal 1 Scald 1 Grand Abolisher
1 Bone Flute 1 Meishin, the Mind Cage 1 Quarum Trench Gnomes 1 Eidolon of Obstruction
1 Grafdigger's Cage 1 Crosswinds 1 Burning Earth 1 Tidal Barracuda
1 Meekstone 1 Reverence 1 Primal Order 1 Vorinclex, Monstrous Raider
1 Torpor Orb 1 Edifice of Authority 1 Alpine Moon 1 Mercurial Transformation
1 Watchdog 1 Sidar Kondo of Jamuraa 1 Magus of the Moon 1 Academic Probation
1 Godhead of Awe 1 Burn from Within 1 Damping Sphere  
1 Gwafa Hazid, Profiteer 1 Hour of Devastation 1 Lithoform Blight  
1 Vhati il-Dal 1 Warkite Marauder    
1 Vish Kal, Blood Arbiter 1 Merfolk Trickster    
1 Mirri, Weatherlight Duelist 1 Detection Tower    
1 Will Kenrith 1 Amulet of Safekeeping    
1 Archetype of Imagination 1 Azorius Skyguard    
1 Ethereal Absolution 1 Massacre Girl    
1 Vedalken Humiliator 1 Angler Turtle    
1 Archetype of Endurance 1 Soul Sculptor    
1 Shadowspear 1 Blightbeetle    
1 Oko, Thief of Crowns 1 Mass Diminish    
1 Kaervek, the Spiteful 1 Zirda, the Dawnwaker    
1 Feast of Succession 1 Armix, Filigree Thrasher    
1 Crippling Fear 1 Pestilent Haze    
1 Elvish Dreadlord 1 Geode Rager    
1 Beyeen Veil // Beyeen Coast 1 Mythos of Vadrok    
1 Waker of Waves 1 Essence Pulse    
1 The Meathook Massacre 1 Sludge Monster    
1 Orcus, Prince of Undeath 1 Boarded Window    
1 Toxrill, the Corrosive 1 Storvald, Frost Giant Jarl    
1 Dress Down 1 Archfiend of Sorrows