Welding Jar 
Artifact
$1.47 #3142 0.07 23.0 years
Sacrifice this artifact: Regenerate target artifact.
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Cards similar to Welding Jar 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.
Pteron Ghost96%
$0.06↓#27432↓0.0022.7 years
"Sacrifice this creature: Regenerate target artifact."
Herbal Poultice88%
$0.36↓#10872↓0.0019.0 years↓
"
, Sacrifice this artifact: Regenerate target creature."
, Sacrifice this artifact: Regenerate target creature."
Loxodon Mender88%
$0.16↓#30475↓0.0623.0 years
"
, 
: Regenerate target artifact."
, : Regenerate target artifact."
Metallurgeon84%
$0.16↓#22826↓0.0018.0 years↓
", : Regenerate target artifact."
, : Regenerate target artifact."
Elven Lyre71%
$0.75↓#31330↓0.0532.0 years↑
"
, , Sacrifice this artifact: Target creature gets +2/+2 until end of turn."
, , Sacrifice this artifact: Target creature gets +2/+2 until end of turn."
Slobad, Goblin Tinkerer70%
$0.40↓#7765↓0.32↑22.7 years
"Sacrifice an artifact: Target artifact gains indestructible until end of turn."
Furnace Skullbomb70%
$0.18↓#17115↓0.073.7 years↓
"
, Sacrifice this artifact: Put two oil counters on target artifact or creature you control. Draw a card. Activate only as a sorcery."
, Sacrifice this artifact: Put two oil counters on target artifact or creature you control. Draw a card. Activate only as a sorcery."