Gremlin Infestation 
Enchantment — Aura
$0.04 #29340 0.26 9.7 years
Enchant artifact
At the beginning of your end step, this Aura deals 2 damage to enchanted artifact's controller.
When enchanted artifact is put into a graveyard, create a 2/2 red Gremlin creature token.
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Cards similar to Gremlin Infestation expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Warp Artifact97%
$0.32↑#292720.12↓33.2 years↑
"At the beginning of the upkeep of enchanted artifact's controller, this Aura deals 1 damage to that player."
+1 more matching line
Parasitic Bond90%
$0.40↑#298280.1928.0 years↑
"At the beginning of the upkeep of enchanted creature's controller, this Aura deals 2 damage to that player."
+1 more matching line
Curse Artifact88%
$0.95↑#291780.1932.2 years↑
"At the beginning of the upkeep of enchanted artifact's controller, this Aura deals 2 damage to that player unless they sacrifice that artifact."
+1 more matching line
Cursed Land88%
$0.21↑#255070.16↓33.2 years↑
"At the beginning of the upkeep of enchanted land's controller, this Aura deals 1 damage to that player."
Wanderlust86%
$0.14↑#296550.07↓33.2 years↑
"At the beginning of the upkeep of enchanted creature's controller, this Aura deals 1 damage to that player."
Maddening Wind85%
$0.19↑#314390.61↑31.4 years↑
"At the beginning of the upkeep of enchanted creature's controller, this Aura deals 2 damage to that player."
Artifact Possession84%
$1.03↑#271700.50↑32.6 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."+1 more matching line
Inertia Bubble84%
$0.04#306320.75↑23.0 years↑
"Enchant artifact"
+1 more matching line
Magnetic Mine82%
$0.32↑#18516↑0.12↓15.7 years↑
"Whenever another artifact is put into a graveyard from the battlefield, this artifact deals 2 damage to that artifact's controller."
Insubordination82%
$0.08↑#277880.1727.0 years↑
"At the beginning of the end step of enchanted creature's controller, this Aura deals 2 damage to that player unless that creature attacked this turn."
+1 more matching line
Feedback81%
$0.22↑#282990.1733.2 years↑
"At the beginning of the upkeep of enchanted enchantment's controller, this Aura deals 1 damage to that player."
+1 more matching line
Relic Bane80%
$0.10↑#281380.50↑23.0 years↑
"Enchanted artifact has "At the beginning of your upkeep, you lose 2 life.""
+1 more matching line
Festering Wound80%
$0.29↑#22593↑0.2827.4 years↑
"At the beginning of the upkeep of enchanted creature's controller, this Aura deals X damage to that player, where X is the number of infection counters on this Aura."
Insolence80%
$0.09↑#295290.11↓25.7 years↑
"Whenever enchanted creature becomes tapped, this Aura deals 2 damage to that creature's controller."
Psychic Venom79%
$0.13↑#246070.07↓33.2 years↑
"Whenever enchanted land becomes tapped, this Aura deals 2 damage to that land's controller."
Clawing Torment78%
$0.17↑#8746↑0.14↓4.7 years↓
"Enchant artifact or creature"
Stasis Cocoon78%
$0.07↑#282400.57↑22.4 years↑
"Enchant artifact"
Errant Minion76%
$0.16↑#295840.10↓31.4 years↑
"At the beginning of the upkeep of enchanted creature's controller, that player may pay any amount of mana. This Aura deals 2 damage to that player. Prevent X of that damage, where X is the amount of mana that player paid this way."
Leeching Licid76%
$0.16↑#299910.12↓29.0 years↑
"At the beginning of the upkeep of enchanted creature's controller, this creature deals 1 damage to that player."
Avalanche of Sector 774%
$0.24↑#10047↑0.11↓1.4 years↓
"Whenever an opponent activates an ability of an artifact they control, this card deals 1 damage to that player."