Energy Chamber 
Artifact
$4.40 #8930 0.40 22.3 years
At the beginning of your upkeep, choose one —
• Put a +1/+1 counter on target artifact creature.
• Put a charge counter on target noncreature artifact.
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Cards similar to Energy Chamber expected a card that isn't here?
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Power Conduit90%
$3.59↓#3117↑0.19↓22.9 years
"• Put a charge counter on target artifact."
+1 more matching line
Moxite Refinery87%
$0.30↓#5262↑0.16↓1.1 years↓
"• Put X charge counters on target artifact."
+1 more matching line
Vedalken Infuser87%
$0.10↓#22574↓0.05↓15.6 years↓
"At the beginning of your upkeep, you may put a charge counter on target artifact."
Coretapper85%
$0.29↓#5687↑0.07↓22.6 years
"
: Put a charge counter on target artifact."
: Put a charge counter on target artifact."+1 more matching line
Dismantle82%
$0.23↓#22195↓0.3922.6 years
"Destroy target artifact. If that artifact had counters on it, put that many +1/+1 counters or charge counters on an artifact you control."
Surge Node80%
$0.22↓#17793↓0.17↓15.3 years↓
"
, , Remove a charge counter from this artifact: Put a charge counter on target artifact."
, , Remove a charge counter from this artifact: Put a charge counter on target artifact."
Sylvan Scavenging77%
$0.27↓#6948↑0.20↓1.8 years↓
"At the beginning of your end step, choose one —"
+1 more matching line
Concord with the Kami76%
$0.24↓#12808↓0.62↑4.5 years↓
"At the beginning of your end step, choose one or more —"
+1 more matching line
Seedpod Caretaker76%
$0.30↓#20782↓0.24↓3.4 years↓
"• Put a +1/+1 counter on target artifact or creature you control."
+1 more matching line
Pollenbright Druid76%
$0.14↓#5593↑0.55↑7.3 years↓
"• Put a +1/+1 counter on target creature."
+1 more matching line
Vannifar, Evolved Enigma75%
$0.38↓#79820.422.6 years↓
"At the beginning of combat on your turn, choose one —"
Apothecary Stomper72%
$0.13↓#15887↓0.14↓1.8 years↓
"When this creature enters, choose one —"
+1 more matching line
Inspirit, Flagship Vessel71%
$0.41↓#3831↑0.441.1 years↓
"At the beginning of combat on your turn, put your choice of a +1/+1 counter or two charge counters on up to one other target artifact."
Filigree Vector70%
$11.03↑#4776↑0.25↓3.4 years↓
"When this creature enters, put a +1/+1 counter on each of any number of target creatures and a charge counter on each of any number of target artifacts."
Weldfast Engineer70%
$0.06↓#31419↓0.06↓9.6 years↓
"At the beginning of combat on your turn, target artifact creature you control gets +2/+0 until end of turn."