Combat Research 
Enchantment — Aura
$0.46 #2224 0.17 4.1 years
Enchant creature
Enchanted creature has "Whenever this creature deals combat damage to a player, draw a card."
As long as enchanted creature is legendary, it gets +1/+1 and has ward
. (Whenever enchanted creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays
.)
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Cards similar to Combat Research 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.
Sixth Sense95%
$0.33↓#6219↓0.00↓9.5 years↑
"Enchanted creature has "Whenever this creature deals combat damage to a player, you may draw a card.""
+1 more matching line
Coastal Piracy88%
$0.29↓#1517↑0.1927.0 years↑
"Whenever a creature you control deals combat damage to an opponent, you may draw a card."
Stealer of Secrets86%
$0.05↓#21082↓0.29↑14.0 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Scroll Thief86%
$0.06↓#17346↓0.00↓16.3 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Nine-Tail White Fox86%
$0.22↓#22246↓0.108.3 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Ophidian Eye86%
$11.83↑#1612↑0.73↑20.0 years↑
"Whenever enchanted creature deals damage to an opponent, you may draw a card."
+1 more matching line
Keen Sense86%
$2.37↑#2848↓0.30↑19.7 years↑
"Whenever enchanted creature deals damage to an opponent, you may draw a card."
Snake Umbra86%
$0.87↑#1518↑0.2116.5 years↑
"Enchanted creature gets +1/+1 and has "Whenever this creature deals damage to an opponent, you may draw a card.""
+1 more matching line
Rogue's Gloves86%
$0.31↓#4162↓0.06↓12.3 years↑
"Whenever equipped creature deals combat damage to a player, you may draw a card."
Curious Obsession85%
$0.20↓#8637↓0.00↓8.8 years↑
"Enchanted creature gets +1/+1 and has "Whenever this creature deals combat damage to a player, you may draw a card.""
Neurok Commando84%
$0.13↓#19219↓0.41↑15.7 years↑
"Whenever this creature deals combat damage to a player, you may draw a card."
Mischievous Catgeist // Catlike Curiosity84%
$0.26↓#12127↓0.00↓4.9 years
"Enchanted creature has "Whenever this creature deals combat damage to a player, draw a card.""
Sleeper's Robe84%
$0.52↑#15714↓0.2226.0 years↑
"Whenever enchanted creature deals combat damage to an opponent, you may draw a card."
+1 more matching line
Ultimecia, Temporal Threat84%
$0.53↑#7307↓0.67↑1.4 years↓
"Whenever a creature you control deals combat damage to a player, draw a card."
Staggering Insight83%
$0.16↓#5530↓0.06↓6.7 years↑
"Enchanted creature gets +1/+1 and has lifelink and "Whenever this creature deals combat damage to a player, draw a card.""
Reconnaissance Mission83%
$0.39↓#908↑0.216.5 years↑
"Whenever a creature you control deals combat damage to a player, you may draw a card."
Edric, Spymaster of Trest83%
$2.02↑#3466↓0.46↑15.3 years↑
"Whenever a creature deals combat damage to one of your opponents, its controller may draw a card."
Sea-Dasher Octopus83%
$0.81↑#4811↓0.04↓6.5 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Marchesa's Infiltrator82%
$0.22↓#22548↓0.27↑12.4 years↑
"Whenever this creature deals combat damage to a player, draw a card."