Serpent of the Pass 
Creature — Serpent
$0.14 #15457 0.00 0.8 years
If there are three or more Lesson cards in your graveyard, you may cast this spell as though it had flash.
This spell costs 
less to cast for each noncreature, nonland card in your graveyard.
less to cast for each noncreature, nonland card in your graveyard.Click a line or tag to filter
Cards similar to Serpent of the Pass 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.
Cryptic Serpent76%
$0.70↑#174740.31↑9.4 years↑
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
Gran-Gran74%
$0.29↑#6539↑0.000.8 years
"Noncreature spells you cast cost less to cast as long as there are three or more Lesson cards in your graveyard."
less to cast as long as there are three or more Lesson cards in your graveyard."
Furygale Flocking74%
$0.26↑#10586↑0.000.4 years
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
Eddymurk Crab73%
$0.73↑#128060.25↑2.1 years↑
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
First-Time Flyer72%
$0.07↓#184130.000.8 years
"This creature gets +1/+1 as long as there's a Lesson card in your graveyard."
Bedlam Reveler72%
$0.19↑#138890.33↑10.1 years↑
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
Tolarian Terror71%
$0.16↑#10659↑0.32↑4.0 years↑
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
The Dawning Archaic70%
$1.19↑#8544↑0.000.4 years
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
Dragonfly Swarm70%
$0.19↑#136490.000.8 years
"This creature's power is equal to the number of noncreature, nonland cards in your graveyard."
+1 more matching line
The Magic Mirror70%
$3.24↑#4922↑0.29↑6.9 years↑
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."