Machinesmith Automaton 
Artifact Creature — Robot Villain
$0.15 #16390 0.15 0.3 years
Trample
Whenever another artifact you control enters, put a +1/+1 counter on this creature.
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Donatello, Way with Machines100%
$0.20↑#132420.200.6 years
"Whenever an artifact you control enters, put a +1/+1 counter on this card."
Oreplate Pangolin99%
$0.15#165950.00↓1.2 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 Star96%
$0.22↑#12726↑0.061.4 years↑
"Whenever an artifact you control enters, put a +1/+1 counter on this card."
Karstoderm96%
$0.08↓#32143↓0.00↓22.7 years↑
"Whenever an artifact enters, remove a +1/+1 counter from this creature."
Ingenious Smith96%
$0.18↑#131220.00↓5.2 years↑
"Whenever one or more artifacts you control enter, put a +1/+1 counter on this creature. This ability triggers only once each turn."
Yotian Dissident95%
$0.23↑#10060↑0.45↑3.9 years↑
"Whenever an artifact you control enters, put a +1/+1 counter on target creature you control."
Mm'menon, Uthros Exile94%
$0.25↑#9069↑0.00↓1.2 years
"Whenever an artifact you control enters, put a +1/+1 counter on target creature."
Towashi Songshaper92%
$0.11↓#26286↓0.124.7 years↑
"Whenever another artifact you control enters, this creature gets +1/+0 until end of turn."
Perimeter Patrol92%
$0.05↓#30820↓0.00↓3.9 years↑
"Whenever an artifact you control enters, this creature gets +1/+0 until end of turn."
Phalanx Vanguard92%
$0.07↓#27483↓0.00↓3.9 years↑
"Whenever an artifact you control enters, this creature gets +1/+0 until end of turn."
Glaze Fiend91%
$0.19↑#24704↓0.00↓18.0 years↑
"Whenever another artifact you control enters, this creature gets +2/+2 until end of turn."
Mandible Justiciar90%
$0.19↑#170240.193.7 years↑
"Whenever another artifact you control enters, this creature gets +1/+1 until end of turn."
Elvish Archivist86%
$0.30↑#8915↑0.193.1 years↑
"Whenever one or more artifacts you control enter, put two +1/+1 counters on this creature. This ability triggers only once each turn."
Surge Conductor86%
$0.33↑#2595↑0.45↑1.2 years
"Whenever another nontoken artifact you control enters, proliferate."
Vermiculos86%
$0.33↑#29534↓0.00↓23.0 years↑
"Whenever an artifact enters, this creature gets +4/+4 until end of turn."
Mechan Assembler84%
$0.26↑#10026↑0.00↓1.2 years
"Whenever another artifact you control enters, create a 2/2 colorless Robot artifact creature token. This ability triggers only once each turn."
Fateful Discovery84%
$3.52↑#7680↑0.58↑0.2 years
"Whenever an artifact you control enters, draw a card."
Arcbound Crusher84%
$4.10↑#6070↑0.47↑22.7 years↑
"Whenever another artifact enters, put a +1/+1 counter on this creature."
Salivating Gremlins84%
$0.02↓#25824↓0.0510.1 years↑
"Whenever an artifact you control enters, this creature gets +2/+0 and gains trample until end of turn."
Teething Wurmlet83%
$0.27↑#7686↑0.223.9 years↑
"Whenever an artifact you control enters, you gain 1 life. If this is the first time this ability has resolved this turn, put a +1/+1 counter on this creature."