Dream Chisel 
Artifact
$4.56 #13931 0.00 24.0 years
Face-down creature spells you cast cost 
less to cast.
less to cast.Click a line or tag to filter
Cards similar to Dream Chisel 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.
Obscuring Aether96%
$0.19↓#115910.0011.6 years↓
"Face-down creature spells you cast cost less to cast."
less to cast."
Kadena, Slinking Sorcerer94%
$0.44↓#125550.22↑7.2 years↓
"The first face-down creature spell you cast each turn costs 
less to cast."
less to cast."
Goblin Maskmaker90%
$0.04↓#21912↓0.052.7 years↓
"Whenever this creature attacks, face-down spells you cast this turn cost less to cast."
less to cast."
Panoptic Projektor90%
$0.31↓#9442↑0.062.7 years↓
"
: The next face-down creature spell you cast this turn costs less to cast."
: The next face-down creature spell you cast this turn costs less to cast."
Stone Calendar74%
$14.91↑#20542↓0.37↑32.2 years↑
"Spells you cast cost less to cast."
less to cast."
Memory Crystal70%
$2.23↓#24089↓0.19↑28.3 years↑
"Buyback costs cost less."
less."