Foundry Assembler 
Artifact Creature — Assembly-Worker
$0.13 #23704 0.05 9.7 years
Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for 
.)
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Cards similar to Foundry Assembler 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.
Enraged Giant100%
$0.05↓#29191↓0.30↑9.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Wind-Kin Raiders100%
$0.04↓#31302↓0.009.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Sweatworks Brawler100%
$0.04↓#29858↓0.129.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Barricade Breaker99%
$0.11↓#203180.119.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Bastion Inventor99%
$0.03↓#28814↓0.069.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Universal Surveillance98%
$0.20↑#5351↑0.064.7 years↓
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Reverse Engineer98%
$0.18↑#8030↑0.129.8 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Maverick Thopterist98%
$0.11↓#190370.24↑9.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Battle at the Bridge98%
$0.28↑#11811↑0.069.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Bottle-Cap Blast97%
$1.86↑#4053↑0.36↑2.6 years↓
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Freejam Regent97%
$0.16↑#260100.009.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Sly Requisitioner97%
$0.10↓#18507↑0.159.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Arc Reactor96%
$0.92↑#5591↑0.28↑0.3 years↓
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Synth Infiltrator96%
$0.29↑#9035↑0.062.6 years↓
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Fen Hauler96%
$0.05↓#29250↓0.069.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Organic Extinction96%
$0.33↑#1314↑0.48↑4.7 years↓
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Metallic Rebuke96%
$0.25↑#10837↑0.44↑9.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Whir of Invention94%
$5.49↑#1336↑0.50↑9.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Ironheart, Clever Champion93%
$0.37↑#9990↑0.26↑0.3 years↓
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."
Herald of Anguish92%
$0.38↑#11568↑0.29↑9.7 years
"Improvise Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for ."
."