Kaijin of the Vanishing Touch {1}{U}
Creature — Spirit
Defender (This creature can't attack.)
Whenever this creature blocks a creature, return that creature to its owner's hand at end of combat. (Return it only if it's on the battlefield.)
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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.
Wall of Tears 100%
$0.62#12309
"Whenever this creature blocks a creature, return that creature to its owner's hand at end of combat."
+1 more matching line
Aether Membrane 100%
$0.57#12528
"Whenever this creature blocks a creature, return that creature to its owner's hand at end of combat."
Wall of Junk 88%
$0.20#5998
"When this creature blocks, return it to its owner's hand at end of combat."
+1 more matching line
Firestorm Phoenix 83%
#28825
"If this creature would die, return it to its owner's hand instead. Until that player's next turn, that player plays with that card revealed in their hand and can't play it."
Lim-Dûl's Cohort 82%
#31170
"Whenever this creature blocks or becomes blocked by a creature, that creature can't be regenerated this turn."
Sawtooth Ogre 80%
$0.07#31405
"Whenever this creature blocks or becomes blocked by a creature, this creature deals 1 damage to that creature at end of combat."
Shape Stealer 80%
$0.33#25270
"Whenever this creature blocks or becomes blocked by a creature, change this creature's base power and toughness to that creature's power and toughness until end of turn."