Urza's Incubator 
Artifact
$20.34 #311 0.62 27.4 years
As this artifact enters, choose a creature type.
Creature spells of the chosen type cost 
less to cast.
less to cast.Click a line or tag to filter
Cards similar to Urza's Incubator 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.
Herald's Horn96%
$2.80↓#151↑0.24↓9.2 years↓
"Creature spells you cast of the chosen type cost 
less to cast."
less to cast."+1 more matching line
Planar Gate90%
$74.69↑#21434↓0.38↓32.4 years↑
"Creature spells you cast cost less to cast."
less to cast."
Shared Triumph88%
$3.98↓#16789↓0.12↓24.0 years↓
"As this enchantment enters, choose a creature type."
+1 more matching line
Mistform Warchief86%
$0.21↓#20278↓0.00↓23.4 years↓
"Creature spells you cast that share a creature type with this creature cost less to cast."
less to cast."+1 more matching line
Belbe's Portal84%
$1.15↓#12745↓0.47↓26.7 years
"As this artifact enters, choose a creature type."
Instruments of War84%
$0.37↓#14293↓0.31↓3.9 years↓
"As this artifact enters, choose a creature type."
Mirror of the Forebears83%
$1.81↓#10612↓0.12↓9.2 years↓
"As this artifact enters, choose a creature type."
Brass Herald83%
$0.23↓#14702↓0.00↓25.4 years↓
"As this creature enters, choose a creature type."
+1 more matching line
Honest Rutstein82%
$0.38↓#1855↓0.16↓2.5 years↓
"Creature spells you cast cost less to cast."
less to cast."
Door of Destinies82%
$2.42↓#1087↓0.41↓18.8 years↓
"As this artifact enters, choose a creature type."
Rally the Ranks82%
$0.35↓#4714↓0.11↓5.7 years↓
"As this enchantment enters, choose a creature type."
Adaptive Automaton82%
$0.43↓#1782↓0.14↓15.3 years↓
"As this creature enters, choose a creature type."
Pillar of Origins81%
$0.43↓#6050↓0.21↓9.1 years↓
"As this artifact enters, choose a creature type."
Obelisk of Urd81%
$2.98↓#4090↓0.18↓12.3 years↓
"As this artifact enters, choose a creature type."
Marauding Raptor80%
$0.85↓#3049↓0.19↓7.3 years↓
"Creature spells you cast cost less to cast."
less to cast."
Heartless Summoning80%
$1.63↓#2677↓0.37↓15.1 years↓
"Creature spells you cast cost less to cast."
less to cast."
Radiant Destiny80%
$0.30↓#5650↓0.00↓8.8 years↓
"As this enchantment enters, choose a creature type."
Gathering Stone80%
$0.44↓#3079↓0.10↓0.7 years↓
"Spells you cast of the chosen type cost less to cast."
less to cast."+1 more matching line
Doom Cannon80%
$0.38↓#27255↓0.07↓24.0 years↓
"As this artifact enters, choose a creature type."
Cover of Darkness80%
$8.71↓#1487↓0.5824.0 years↓
"As this enchantment enters, choose a creature type."