Karstoderm 
Creature — Beast
$0.08 #32143 0.00 22.7 years
This creature enters with five +1/+1 counters on it.
Whenever an artifact enters, remove a +1/+1 counter from this creature.
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Cards similar to Karstoderm expected a card that isn't here?
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Machinesmith Automaton96%
$0.15↑#16390↑0.15↑0.3 years↓
"Whenever another artifact you control enters, put a +1/+1 counter on this creature."
Donatello, Way with Machines96%
$0.20↑#13242↑0.20↑0.6 years↓
"Whenever an artifact you control enters, put a +1/+1 counter on this card."
Oreplate Pangolin95%
$0.15↑#16595↑0.001.2 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 Star92%
$0.22↑#12726↑0.061.4 years↓
"Whenever an artifact you control enters, put a +1/+1 counter on this card."
Ingenious Smith92%
$0.18↑#13122↑0.005.2 years↓
"Whenever one or more artifacts you control enter, put a +1/+1 counter on this creature. This ability triggers only once each turn."
Mm'menon, Uthros Exile90%
$0.25↑#9069↑0.001.2 years↓
"Whenever an artifact you control enters, put a +1/+1 counter on target creature."
Yotian Dissident90%
$0.23↑#10060↑0.45↑3.9 years↓
"Whenever an artifact you control enters, put a +1/+1 counter on target creature you control."
Towashi Songshaper90%
$0.11↑#262860.12↑4.7 years↓
"Whenever another artifact you control enters, this creature gets +1/+0 until end of turn."
Perimeter Patrol90%
$0.05↓#308200.003.9 years↓
"Whenever an artifact you control enters, this creature gets +1/+0 until end of turn."
Phalanx Vanguard90%
$0.07↓#274830.003.9 years↓
"Whenever an artifact you control enters, this creature gets +1/+0 until end of turn."
Glaze Fiend89%
$0.19↑#24704↑0.0018.0 years↓
"Whenever another artifact you control enters, this creature gets +2/+2 until end of turn."
Mandible Justiciar88%
$0.19↑#17024↑0.19↑3.7 years↓
"Whenever another artifact you control enters, this creature gets +1/+1 until end of turn."
Vermiculos87%
$0.33↑#295340.0023.0 years
"Whenever an artifact enters, this creature gets +4/+4 until end of turn."
Arcbound Crusher86%
$4.10↑#6070↑0.47↑22.7 years
"Whenever another artifact enters, put a +1/+1 counter on this creature."
Surge Conductor84%
$0.33↑#2595↑0.45↑1.2 years↓
"Whenever another nontoken artifact you control enters, proliferate."
Leonin Elder83%
$0.38↑#7911↑0.0723.0 years
"Whenever an artifact enters, you may gain 1 life."
Mechan Assembler83%
$0.26↑#10026↑0.001.2 years↓
"Whenever another artifact you control enters, create a 2/2 colorless Robot artifact creature token. This ability triggers only once each turn."
Elvish Archivist82%
$0.30↑#8915↑0.19↑3.1 years↓
"Whenever one or more artifacts you control enter, put two +1/+1 counters on this creature. This ability triggers only once each turn."
Shipwreck Sentry82%
$0.09↑#25011↑0.002.9 years↓
"As long as an artifact entered the battlefield under your control this turn, this creature can attack as though it didn't have defender."
Mechan Shieldmate82%
$0.10↑#21933↑0.001.2 years↓
"As long as an artifact entered the battlefield under your control this turn, this creature can attack as though it didn't have defender."