Swan Song 
Instant
$9.86 #68 0.79 12.9 years
Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.
Click a line or tag to filter
Cards similar to Swan Song 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.
Miscast78%
$1.20↓#2696↓0.31↓6.2 years↓
"Counter target instant or sorcery spell unless its controller pays 
."
."
Flusterstorm75%
$4.99↓#307↓0.7015.2 years↑
"Counter target instant or sorcery spell unless its controller pays 
."
."
Extinguish74%
$0.25↓#27936↓0.60↓28.2 years↑
"Counter target sorcery spell."
Envelop74%
$3.31↓#20582↓0.60↓24.3 years↑
"Counter target sorcery spell."
Dispel74%
$0.28↓#919↓0.33↓16.6 years↑
"Counter target instant spell."
Disrupt74%
$0.27↓#10216↓0.43↓29.2 years↑
"Counter target instant or sorcery spell unless its controller pays ."
."
Psychic Rebuttal74%
$0.20↓#20057↓0.19↓11.1 years↓
"Counter target instant or sorcery spell that targets you."
Muddle the Mixture73%
$1.84↓#694↓0.44↓20.9 years↑
"Counter target instant or sorcery spell."
Molten Influence73%
$7.84↓#17581↓0.91↑24.9 years↑
"Counter target instant or sorcery spell unless its controller has this card deal 4 damage to them."
Obscura Charm70%
$0.22↓#8540↓0.29↓4.4 years↓
"• Counter target instant or sorcery spell."
Judge's Familiar70%
$0.23↓#5502↓0.45↓13.9 years
"Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays ."
."
Cursecatcher70%
$0.44↓#11621↓0.67↓18.3 years↑
"Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays ."
."