Thoughtbound Phantasm 
Creature — Spirit
$0.24 #17202 0.06 8.0 years
Defender
Whenever you surveil, put a +1/+1 counter on this creature.
As long as this creature has three or more +1/+1 counters on it, it can attack as though it didn't have defender.
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Cards similar to Thoughtbound Phantasm 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.
Dimir Spybug96%
$0.17↓#139880.128.0 years
"Whenever you surveil, put a +1/+1 counter on this creature."
Scuttlegator94%
$0.11↓#21207↓0.007.7 years
"As long as this creature has a +1/+1 counter on it, it can attack as though it didn't have defender."
+1 more matching line
Skyclave Sentinel90%
$0.15↓#24514↓0.006.1 years↓
"As long as this creature has a +1/+1 counter on it, it can attack as though it didn't have defender."
+1 more matching line
Demon Wall88%
$0.23↓#160460.28↑1.4 years↓
"As long as this creature has a counter on it, it can attack as though it didn't have defender."
+1 more matching line
Backstreet Bruiser86%
$0.03↓#26749↓0.17↑4.5 years↓
"As long as there are two or more counters among creatures you control, this creature can attack as though it didn't have defender."
+1 more matching line
Mirko, Obsessive Theorist84%
$0.33↑#8156↑0.122.7 years↓
"Whenever you surveil, put a +1/+1 counter on this card."