Hullbreaker Horror 
Creature — Kraken Horror
$5.32 #274 1.74 4.8 years
Flash
This spell can't be countered.
Whenever you cast a spell, choose up to one —
• Return target spell you don't control to its owner's hand.
• Return target nonland permanent to its owner's hand.
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Cards similar to Hullbreaker Horror 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.
Unsubstantiate90%
$0.19↓#5121↓0.39↓10.1 years↑
"Return target spell or creature to its owner's hand."
Sink into Stupor // Soporific Springs90%
$7.79↑#171↑0.52↓2.2 years↓
"Return target spell or nonland permanent an opponent controls to its owner's hand."
Eject89%
$0.22↓#11324↓0.26↓1.2 years↓
"Return target nonland permanent to its owner's hand."
+1 more matching line
Reprieve88%
$1.78↓#608↓0.35↓3.2 years↓
"Return target spell to its owner's hand."
Brutal Expulsion86%
$0.19↓#20238↓0.00↓10.9 years↑
"• Return target spell or creature to its owner's hand."
Run Ashore86%
$0.09↓#25449↓0.13↓5.6 years
"• Return target nonland permanent to its owner's hand."
+1 more matching line
Spellscorn Coven // Take It Back84%
$0.26↓#11222↓0.38↓3.0 years↓
"Return target spell to its owner's hand."
Inevitable Defeat84%
$0.36↓#6617↓0.22↓1.4 years↓
"This spell can't be countered."
You Come to a River84%
$0.23↓#8066↓0.33↓5.1 years
"• Fight the Current — Return target nonland permanent to its owner's hand."
Divide by Zero84%
$0.08↓#16956↓0.07↓5.4 years
"Return target spell or permanent with mana value 1 or greater to its owner's hand."
Void Squall83%
$0.11↓#28013↓0.35↓11.4 years↑
"Return target nonland permanent to its owner's hand."
Sublime Epiphany82%
$0.21↓#1708↓0.32↓6.2 years↑
"• Return target nonland permanent to its owner's hand."
Depart the Realm82%
$0.29↓#9882↓0.59↓5.6 years
"Return target nonland permanent to its owner's hand."
Machine Over Matter82%
$0.16↓#14939↓0.74↓3.8 years
"Return target nonland permanent to its owner's hand."
Wail of the Forgotten82%
$0.22↓#13933↓0.00↓2.8 years↓
"• Return target nonland permanent to its owner's hand."
Prismari Charm81%
$0.30↓#5826↓0.00↓0.4 years↓
"• Return target nonland permanent to its owner's hand."
Venser, Shaper Savant81%
$0.33↓#1966↓0.40↓19.3 years↑
"When this card enters, return target spell or permanent to its owner's hand."
+1 more matching line
Hit-Monkey81%
$2.59↓#13766↓0.00↓0.2 years↓
"This spell can't be countered."
Last Word81%
$0.65↓#18697↓0.67↓22.6 years↑
"This spell can't be countered."
Vexing Beetle81%
$0.24↓#31481↓0.00↓23.6 years↑
"This spell can't be countered."