Captain Storm, Cosmium Raider 
Legendary Creature — Human Pirate
$0.25 #6159 0.14 2.9 years
Whenever an artifact you control enters, put a +1/+1 counter on target Pirate you control.
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Yotian Dissident82%
$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 Exile80%
$0.25#9069↓0.00↓1.2 years↓
"Whenever an artifact you control enters, put a +1/+1 counter on target creature."
Donatello, Way with Machines78%
$0.20↓#13242↓0.200.6 years↓
"Whenever an artifact you control enters, put a +1/+1 counter on this card."
Machinesmith Automaton78%
$0.15↓#16390↓0.150.3 years↓
"Whenever another artifact you control enters, put a +1/+1 counter on this creature."
Oreplate Pangolin76%
$0.15↓#16595↓0.00↓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 Star74%
$0.22↓#12726↓0.061.4 years↓
"Whenever an artifact you control enters, put a +1/+1 counter on this card."
Ingenious Smith73%
$0.18↓#13122↓0.00↓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."
Karstoderm73%
$0.08↓#32143↓0.00↓22.7 years↑
"Whenever an artifact enters, remove a +1/+1 counter from this creature."