Contagion Engine 
Artifact
$12.75 #1848 0.57 15.9 years
When this artifact enters, put a -1/-1 counter on each creature target player controls.
, 
: Proliferate twice. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)Click a line or tag to filter
Cards similar to Contagion Engine 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.
Contagion Clasp95%
$0.34↓#1420↑0.36↓16.0 years
", : Proliferate."
, : Proliferate."+1 more matching line
Karn's Bastion86%
$2.48↓#208↑0.23↓7.3 years↓
", : Proliferate."
, : Proliferate."
Soul Snuffers86%
$0.27↓#5038↓0.21↓18.1 years↑
"When this creature enters, put a -1/-1 counter on each creature."
Viral Drake84%
$0.62↓#7074↓0.95↑15.3 years
"
: Proliferate."
: Proliferate."
Merfolk Skydiver84%
$0.24↓#6599↓0.15↓7.3 years↓
"
: Proliferate."
: Proliferate."
Skinrender83%
$0.17↓#5738↓0.40↓15.9 years
"When this creature enters, put three -1/-1 counters on target creature."
Cultbrand Cinder83%
$0.11↓#30299↓0.00↓18.3 years↑
"When this creature enters, put a -1/-1 counter on target creature."
Darkness Descends82%
$0.27↓#10402↓0.00↓0.6 years↓
"Put two -1/-1 counters on each creature."
Harbinger of Night82%
$28.20↑#14222↓0.5029.9 years↑
"At the beginning of your upkeep, put a -1/-1 counter on each creature."
Blight Rot80%
$0.25↓#9217↓0.00↓0.6 years↓
"Put four -1/-1 counters on target creature."
Scar79%
$0.23↓#19614↓0.29↓18.3 years↑
"Put a -1/-1 counter on target creature."
Lulu, Stern Guardian77%
$0.49↓#3602↓0.20↓1.2 years↓
": Proliferate."
: Proliferate."
Instill Infection76%
$0.11↓#23712↓0.07↓15.9 years
"Put a -1/-1 counter on target creature."
Banewhip Punisher76%
$0.29↓#10977↓0.00↓9.1 years↓
"When this creature enters, you may put a -1/-1 counter on target creature."
Grim Affliction76%
$0.31↓#4601↓0.33↓15.3 years
"Put a -1/-1 counter on target creature, then proliferate."
Pith Driller74%
$0.16↓#27874↓0.28↓15.3 years
"When this creature enters, put a -1/-1 counter on target creature."
Splendid Agony74%
$0.14↓#15059↓0.00↓9.4 years↓
"Distribute two -1/-1 counters among one or two target creatures."
Atraxa, Praetors' Voice74%
$24.32↑#2475↓1.72↑9.8 years↓
"At the beginning of your end step, proliferate."
Cartouche of Ambition74%
$0.14↓#15437↓0.06↓9.4 years↓
"When this Aura enters, you may put a -1/-1 counter on target creature."
Eyeblight Assassin73%
$0.07↓#21888↓0.31↓11.1 years↓
"When this creature enters, target creature an opponent controls gets -1/-1 until end of turn."