Cunning Nightbonder 
Creature — Human Rogue
$0.25 #10307 0.25 6.4 years
Flash
Spells with flash you cast cost 
less to cast and can't be countered.
less to cast and can't be countered.Click a line or tag to filter
Cards similar to Cunning Nightbonder 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.
Slitherwisp85%
$0.28↑#12788↓0.00↓6.4 years
"Flash"
Thryx, the Sudden Storm80%
$0.25#3436↑0.256.6 years
"Spells you cast with mana value 5 or greater cost less to cast and can't be countered."
less to cast and can't be countered."+1 more matching line
Errant and Giada80%
$0.35↑#7800↑0.253.4 years↓
"Flash"
Gaea's Herald78%
$1.18↑#12461↓1.40↑25.6 years↑
"Creature spells can't be countered."
Prowling Serpopard77%
$2.98↑#3635↑0.349.4 years↑
"Creature spells you control can't be countered."
Stone Calendar74%
$14.67↑#20270↓0.48↑32.1 years↑
"Spells you cast cost less to cast."
less to cast."
Vexing Shusher74%
$6.27↑#5497↑0.3518.3 years↑
"This spell can't be countered."
Insist74%
$2.06↑#17489↓0.07↓24.6 years↑
"The next creature spell you cast this turn can't be countered."
Leyline of Lifeforce73%
$6.06↑#13118↓0.40↑20.6 years↑
"Creature spells can't be countered."
Savage Summoning72%
$2.14↑#98560.3513.1 years↑
"The next creature spell you cast this turn can be cast as though it had flash. That spell can't be countered. That creature enters with an additional +1/+1 counter on it."
Lier, Disciple of the Drowned72%
$0.96↑#2185↑0.62↑4.9 years↓
"Spells can't be countered."
Surrak Dragonclaw72%
$2.73↑#3251↑0.3011.9 years↑
"Creature spells you control can't be countered."
Chimil, the Inner Sun71%
$9.64↑#759↑0.74↑2.8 years↓
"Spells you control can't be countered."
Helm of Awakening70%
$1.51↑#1903↑0.36↑29.6 years↑
"Spells cost less to cast."
less to cast."
Sphinx of the Final Word70%
$0.20↓#100870.14↓10.6 years↑
"Instant and sorcery spells you control can't be countered."