Imperial Cosmographer 
Creature — Kree Scientist
$0.23 #30335 0.00 0.2 years
Vigilance
Whenever another creature you control leaves the battlefield without dying, put two +1/+1 counters on this creature.
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Cards similar to Imperial Cosmographer expected a card that isn't here?
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"Whenever this creature or another creature you control leaves the battlefield without dying, put a +1/+1 counter on target creature you control."
Flaming Fist Officer92%
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"Whenever another creature you control leaves the battlefield, put a +1/+1 counter on this creature."
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"Whenever another creature you control leaves the battlefield, put a +1/+1 counter on this creature."
Taeko, the Patient Avalanche88%
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"Whenever another creature you control leaves the battlefield, if it didn't die, scry 1 and put a +1/+1 counter on this card."
Dour Port-Mage84%
$2.86↑#1508↑0.31↑2.1 years↑
"Whenever one or more other creatures you control leave the battlefield without dying, draw a card."
Big Bertha82%
$0.28↑#24155↑0.000.2 years
"Vigilance"
Super Shredder79%
$18.35↑#5469↑0.000.5 years
"Whenever another permanent leaves the battlefield, put a +1/+1 counter on this card."
Aang, Airbending Master79%
$9.23↑#4936↑0.000.8 years
"Whenever one or more creatures you control leave the battlefield without dying, you get an experience counter."
Solemn Recruit79%
$0.14↓#15802↑0.38↑9.6 years↑
"At the beginning of your end step, if a permanent left the battlefield under your control this turn, put a +1/+1 counter on this creature."
Unholy Officiant78%
$0.12↓#18386↑0.22↑4.8 years↑
"Vigilance"
Faithful Watchdog78%
$0.17↓#8717↑0.24↑2.2 years↑
"Vigilance"
Costume Closet75%
$0.19↓#10577↑0.25↑1.0 years
"Whenever a modified creature you control leaves the battlefield, put a +1/+1 counter on this artifact."
Tokka & Rahzar, Unsupervised75%
$0.28↑#12130↑0.000.5 years
"Whenever another nontoken creature you control leaves the battlefield, put a +1/+1 counter on this card and create a Treasure token. This ability triggers only once each turn."
Leader's Talent74%
$0.62↑#10284↑0.000.5 years
"Whenever a creature you control leaves the battlefield, if it had a counter on it, you gain 2 life."
Atlantean Cavalry74%
$0.08↓#20888↑0.000.2 years
"Vigilance"
Lakeshore Apothecary74%
$0.22↓#22864↑0.000.1 years
"Vigilance"
Boomer Scrapper74%
$0.28↑#11984↑0.56↑2.5 years↑
"Whenever a token you control leaves the battlefield, put a +1/+1 counter on this creature."
Twilight Drover74%
$0.25↑#6629↑0.0021.0 years↑
"Whenever a creature token leaves the battlefield, put a +1/+1 counter on this creature."
Shortcut to Mushrooms72%
$0.17↓#11995↑0.42↑3.2 years↑
"At the beginning of your end step, if a permanent you controlled left the battlefield this turn, put a +1/+1 counter on target creature you control."
Hulkling, Burgeoning Bruiser72%
$0.19↓#22539↑0.000.2 years
"Vigilance"