Stalked Researcher 

Creature — Human Wizard
Defender
Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, this creature can attack this turn as though it didn't have defender.
click a line to search just that ability, click more to combine them
Cards that do something similar 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.
Steelclad Spirit 97%
$0.06#28640
"Whenever an enchantment you control enters, this creature can attack this turn as though it didn't have defender."
+1 more matching line
Godhunter Octopus 83%
$0.06#27900
"This creature can't attack unless defending player controls an enchantment or an enchanted permanent."
Floodtide Serpent 81%
$0.06#29779
"This creature can't attack unless you return an enchantment you control to its owner's hand."