Gremlin Infestation 

Enchantment — Aura
$0.06 #28970 0.29 9.6 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%
$0.34↑#290080.17↓33.1 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%
$0.39↑#294490.3327.9 years↑
"At the beginning of the upkeep of enchanted creature's controller, this Aura deals 2 damage to that player."
Cursed Land88%
$0.18↑#251450.05↓33.1 years↑
"At the beginning of the upkeep of enchanted land's controller, this Aura deals 1 damage to that player."
Curse Artifact88%
$0.92↑#289070.2232.1 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
Wanderlust86%
$0.16↑#293600.2733.1 years↑
"At the beginning of the upkeep of enchanted creature's controller, this Aura deals 1 damage to that player."
+1 more matching line
Maddening Wind85%
$0.19↑#311750.00↓31.3 years↑
"At the beginning of the upkeep of enchanted creature's controller, this Aura deals 2 damage to that player."
+1 more matching line
Artifact Possession84%
$1.11↑#268120.44↑32.5 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."
+1 more matching line
Magnetic Mine82%
$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."
Insubordination82%
$0.11↑#274910.00↓26.9 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."
Feedback81%
$0.18↑#280730.06↓33.1 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%
$0.07↑#278410.00↓22.9 years↑
"Enchanted artifact has "At the beginning of your upkeep, you lose 2 life.""
+1 more matching line
Festering Wound80%
$0.28↑#22342↑0.2827.2 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%
$0.10↑#291860.3125.6 years↑
"Whenever enchanted creature becomes tapped, this Aura deals 2 damage to that creature's controller."
Psychic Venom79%
$0.13↑#243180.1933.1 years↑
"Whenever enchanted land becomes tapped, this Aura deals 2 damage to that land's controller."
Errant Minion76%
$0.18↑#291990.69↑31.3 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%
$0.19↑#296890.00↓28.9 years↑
"At the beginning of the upkeep of enchanted creature's controller, this creature deals 1 damage to that player."