Contagion Clasp 
Artifact
$0.34 #1420 0.36 16.0 years
When this artifact enters, put a -1/-1 counter on target creature.
, 
: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)Click a line or tag to filter
Cards similar to Contagion Clasp 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 Engine95%
$12.75↑#1848↓0.57↑15.9 years
", : Proliferate twice."
, : Proliferate twice."+1 more matching line
Karn's Bastion94%
$2.48↑#208↑0.23↓7.3 years↓
", : Proliferate."
, : Proliferate."
Cultbrand Cinder94%
$0.11↓#30299↓0.00↓18.3 years↑
"When this creature enters, put a -1/-1 counter on target creature."
Skinrender94%
$0.17↓#5738↓0.4015.9 years
"When this creature enters, put three -1/-1 counters on target creature."
Viral Drake90%
$0.62↑#7074↓0.95↑15.3 years
"
: Proliferate."
: Proliferate."
Merfolk Skydiver90%
$0.24↓#6599↓0.15↓7.3 years↓
"
: Proliferate."
: Proliferate."+1 more matching line
Scar88%
$0.23↓#19614↓0.2918.3 years↑
"Put a -1/-1 counter on target creature."
Blight Rot88%
$0.25↓#9217↓0.00↓0.6 years↓
"Put four -1/-1 counters on target creature."
Instill Infection84%
$0.11↓#23712↓0.07↓15.9 years
"Put a -1/-1 counter on target creature."
Grim Affliction84%
$0.31↓#4601↓0.3315.3 years
"Put a -1/-1 counter on target creature, then proliferate."
Banewhip Punisher83%
$0.29↓#10977↓0.00↓9.1 years↓
"When this creature enters, you may put a -1/-1 counter on target creature."
Eyeblight Assassin82%
$0.07↓#21888↓0.3111.1 years↓
"When this creature enters, target creature an opponent controls gets -1/-1 until end of turn."
Lulu, Stern Guardian82%
$0.49↑#3602↓0.20↓1.2 years↓
": Proliferate."
: Proliferate."
Blister Beetle82%
$0.05↓#24629↓0.2917.9 years↑
"When this creature enters, target creature gets -1/-1 until end of turn."
Farbog Boneflinger82%
$0.06↓#30716↓0.2914.6 years↓
"When this creature enters, target creature gets -2/-2 until end of turn."
Soul Snuffers82%
$0.27↓#5038↓0.21↓18.1 years↑
"When this creature enters, put a -1/-1 counter on each creature."
Gnarled Effigy82%
$0.18↓#27488↓0.24↓18.3 years↑
", : Put a -1/-1 counter on target creature."
, : Put a -1/-1 counter on target creature."
Pith Driller81%
$0.16↓#27874↓0.2815.3 years
"When this creature enters, put a -1/-1 counter on target creature."
Cartouche of Ambition81%
$0.14↓#15437↓0.06↓9.4 years↓
"When this Aura enters, you may put a -1/-1 counter on target creature."
Keening Banshee80%
$0.12↓#27308↓0.00↓21.0 years↑
"When this creature enters, target creature gets -2/-2 until end of turn."