Mm'menon, Uthros Exile 
Legendary Creature — Jellyfish Advisor
$0.25 #9317 0.06 1.1 years
Flying
Whenever an artifact you control enters, put a +1/+1 counter on target creature.
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Cards similar to Mm'menon, Uthros Exile expected a card that isn't here?
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Yotian Dissident98%
$0.25#99120.29↑3.8 years↑
"Whenever an artifact you control enters, put a +1/+1 counter on target creature you control."
Donatello, Way with Machines93%
$0.21↓#13634↓0.000.5 years
"Whenever an artifact you control enters, put a +1/+1 counter on this card."
+1 more matching line
Machinesmith Automaton92%
$0.17↓#17896↓0.000.2 years
"Whenever another artifact you control enters, put a +1/+1 counter on this creature."
Oreplate Pangolin90%
$0.14↓#16597↓0.121.1 years
"Whenever another artifact you control enters, you may pay . If you do, put a +1/+1 counter on this creature."
. If you do, put a +1/+1 counter on this creature."
Tidus, Blitzball Star90%
$0.18↓#12782↓0.38↑1.2 years
"Whenever an artifact you control enters, put a +1/+1 counter on this card."
Karstoderm88%
$0.05↓#31823↓0.35↑22.6 years↑
"Whenever an artifact enters, remove a +1/+1 counter from this creature."
Ingenious Smith87%
$0.16↓#13239↓0.005.1 years↑
"Whenever one or more artifacts you control enter, put a +1/+1 counter on this creature. This ability triggers only once each turn."
Replication Specialist86%
$0.19↓#13353↓0.56↑4.5 years↑
"Flying"
Thopter Architect86%
$0.11↓#22878↓0.24↑3.8 years↑
"Whenever an artifact you control enters, target creature gains flying until end of turn."
Glaze Fiend85%
$0.17↓#24361↓0.0017.9 years↑
"Whenever another artifact you control enters, this creature gets +2/+2 until end of turn."
+1 more matching line
Towashi Songshaper84%
$0.10↓#25896↓0.004.5 years↑
"Whenever another artifact you control enters, this creature gets +1/+0 until end of turn."
Perimeter Patrol84%
$0.04↓#30426↓0.003.8 years↑
"Whenever an artifact you control enters, this creature gets +1/+0 until end of turn."
Phalanx Vanguard84%
$0.04↓#27045↓0.27↑3.8 years↑
"Whenever an artifact you control enters, this creature gets +1/+0 until end of turn."
Veil of Assimilation83%
$0.11↓#18468↓0.27↑3.6 years↑
"Whenever this artifact or another artifact you control enters, target creature you control gets +1/+1 and gains vigilance until end of turn."
Mandible Justiciar83%
$0.18↓#16734↓0.24↑3.6 years↑
"Whenever another artifact you control enters, this creature gets +1/+1 until end of turn."
Mechan Assembler81%
$0.28↑#102100.16↑1.1 years
"Whenever another artifact you control enters, create a 2/2 colorless Robot artifact creature token. This ability triggers only once each turn."
The Mighty Thor, Jane Foster81%
$0.42↑#12217↓0.000.2 years
"Flying"
Surge Conductor80%
$0.36↑#2751↑0.37↑1.1 years
"Whenever another nontoken artifact you control enters, proliferate."
Skyrider Patrol80%
$0.11↓#23353↓0.008.1 years↑
"Flying"
Arcbound Crusher79%
$4.08↑#6012↑0.22↑22.6 years↑
"Whenever another artifact enters, put a +1/+1 counter on this creature."