Avalanche of Sector 7 
Legendary Creature — Human Rebel
$0.22 #10192 0.38 1.2 years
Menace
Avalanche of Sector 7's power is equal to the number of artifacts your opponents control.
Whenever an opponent activates an ability of an artifact they control, Avalanche of Sector 7 deals 1 damage to that player.
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Cards similar to Avalanche of Sector 7 expected a card that isn't here?
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Harsh Mentor93%
$0.29↑#2394↑0.479.4 years↑
"Whenever an opponent activates an ability of an artifact, creature, or land on the battlefield, if it isn't a mana ability, this creature deals 2 damage to that player."
Burning-Tree Shaman92%
$0.37↑#22268↓0.3820.6 years↑
"Whenever a player activates an ability that isn't a mana ability, this creature deals 1 damage to that player."
Immolation Shaman89%
$0.47↑#7359↑0.17↓7.6 years↑
"Whenever an opponent activates an ability of an artifact, creature, or land that isn't a mana ability, this creature deals 1 damage to that player."
Haunting Wind87%
$16.29↑#25444↓0.67↑32.5 years↑
"Whenever an artifact becomes tapped or a player activates an artifact's ability without 
in its activation cost, this enchantment deals 1 damage to that artifact's controller."
in its activation cost, this enchantment deals 1 damage to that artifact's controller."
Gaea's Avenger86%
$55.21↑#26343↓0.25↓32.5 years↑
"this card's power and toughness are each equal to 1 plus the number of artifacts your opponents control."
Artifact Possession84%
$1.11↑#26812↓0.4432.5 years↑
"Whenever enchanted artifact becomes tapped or a player activates an ability of enchanted artifact without in its activation cost, this Aura deals 2 damage to that artifact's controller."
in its activation cost, this Aura deals 2 damage to that artifact's controller."
Filigree Attendant81%
$0.17↓#82020.59↑5.2 years↑
"this card's power is equal to the number of artifacts you control."
Cephalopod Sentry81%
$0.19↓#12658↓0.06↓3.6 years↑
"this card's power is equal to the number of artifacts you control."
Warp Artifact78%
$0.34↑#29008↓0.17↓33.1 years↑
"At the beginning of the upkeep of enchanted artifact's controller, this Aura deals 1 damage to that player."
Flamescroll Celebrant // Revel in Silence78%
$0.34↑#116470.395.4 years↑
"Whenever an opponent activates an ability that isn't a mana ability, this creature deals 1 damage to that player."
Magnetic Mine77%
$0.31↑#18155↓0.3315.6 years↑
"Whenever another artifact is put into a graveyard from the battlefield, this artifact deals 2 damage to that artifact's controller."
Slag Fiend76%
$0.20↓#25471↓0.00↓15.3 years↑
"this card's power and toughness are each equal to the number of artifact cards in all graveyards."
Brotherhood Vertibird76%
$0.36↑#4806↑0.292.5 years↑
"this card's power is equal to the number of artifacts you control."
Gremlin Infestation74%
$0.06↓#28970↓0.299.6 years↑
"At the beginning of your end step, this Aura deals 2 damage to enchanted artifact's controller."
Powerleech74%
$19.83↑#21538↓0.06↓32.5 years↑
"Whenever an artifact an opponent controls becomes tapped or an opponent activates an artifact's ability without in its activation cost, you gain 1 life."
in its activation cost, you gain 1 life."
Vengeful Tracker72%
$0.14↓#13609↓0.292.6 years↑
"Whenever an opponent sacrifices an artifact, this creature deals 2 damage to them."
Sardian Avenger72%
$0.81↑#7778↑0.473.8 years↑
"Whenever an artifact an opponent controls is put into a graveyard from the battlefield, this creature deals 1 damage to that player."
+1 more matching line
Visage of Dread // Dread Osseosaur72%
$0.17↓#19013↓0.12↓2.8 years↑
"Menace"
Darksteel Juggernaut71%
$1.08↑#4649↑0.24↓15.9 years↑
"this card's power and toughness are each equal to the number of artifacts you control."
Bone Pit Brute71%
$0.02↓#28296↓0.00↓6.2 years↑
"Menace"