Welding Jar 
Artifact
$1.65 #3152 0.23 22.9 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%
$0.10↓#27113↓0.3122.6 years
"Sacrifice this creature: Regenerate target artifact."
Loxodon Mender88%
$0.14↓#30171↓0.2522.9 years
"
, 
: Regenerate target artifact."
, : Regenerate target artifact."
Herbal Poultice87%
$0.39↓#10723↓0.2018.9 years↓
"
, Sacrifice this artifact: Regenerate target creature."
, Sacrifice this artifact: Regenerate target creature."
Metallurgeon87%
$0.15↓#22546↓0.57↑17.9 years↓
", : Regenerate target artifact."
, : Regenerate target artifact."
Jhoira's Toolbox72%
$0.26↓#19719↓0.2727.6 years↑
"
: Regenerate target artifact creature."
: Regenerate target artifact creature."
Elven Lyre71%
$0.77↓#31037↓0.1731.8 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↓#7596↓0.2822.6 years
"Sacrifice an artifact: Target artifact gains indestructible until end of turn."
Furnace Skullbomb70%
$0.14↓#16905↓0.253.6 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."