Launch Mishap 
Instant
$0.25 #14314 0.42 3.8 years
Counter target creature or planeswalker spell. Create a 1/1 colorless Thopter artifact creature token with flying.
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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.
Strix Serenade92%
$1.93↑#1046↑0.462.2 years↓
"Counter target artifact, creature, or planeswalker spell. Its controller creates a 2/2 blue Bird creature token with flying."
Geist Snatch90%
$0.11↓#23924↓0.17↓14.3 years↑
"Counter target creature spell. Create a 1/1 blue Spirit creature token with flying."
Bar the Gate85%
$0.24↓#9897↑0.25↓5.1 years↑
"Counter target creature or planeswalker spell. Venture into the dungeon."
Summoner's Bane84%
$0.07↓#23344↓0.05↓16.9 years↑
"Counter target creature spell. Create a 2/2 blue Illusion creature token."
No Escape78%
$0.15↓#168300.417.3 years↑
"Counter target creature or planeswalker spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard."
Syphon Essence78%
$0.07↓#21626↓0.00↓4.8 years↑
"Counter target creature or planeswalker spell. Create a Blood token."
Preemptive Strike77%
$6.34↑#28822↓0.29↓27.3 years↑
"Counter target creature spell."
False Summoning77%
$0.21↓#24689↓0.56↑28.2 years↑
"Counter target creature spell."
Essence Scatter77%
$0.07↓#2719↑0.28↓17.1 years↑
"Counter target creature spell."
Reject75%
$0.21↓#18173↓0.24↓5.4 years↑
"Counter target creature or planeswalker spell unless its controller pays 
. If that spell is countered this way, exile it instead of putting it into its owner's graveyard."
. If that spell is countered this way, exile it instead of putting it into its owner's graveyard."
Bone to Ash73%
$0.05↓#139270.20↓14.6 years↑
"Counter target creature spell."
Exclude73%
$0.16↓#9282↑0.00↓25.9 years↑
"Counter target creature spell."
Anticognition73%
$0.21↓#128100.24↓5.9 years↑
"Counter target creature or planeswalker spell unless its controller pays . If an opponent has eight or more cards in their graveyard, instead counter that spell, then scry 2."
. If an opponent has eight or more cards in their graveyard, instead counter that spell, then scry 2."