Imperial Cosmographer 
Creature — Kree Scientist
$0.21 #30096 0.26 0.3 years
Vigilance
Whenever another creature you control leaves the battlefield without dying, put two +1/+1 counters on this creature.
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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."
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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."
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$2.99↑#1538↑0.192.2 years↑
"Whenever one or more other creatures you control leave the battlefield without dying, draw a card."
Big Bertha82%
$0.31↑#23350↑0.38↑0.3 years
"Vigilance"
Super Shredder79%
$16.40↑#5025↑0.67↑0.6 years
"Whenever another permanent leaves the battlefield, put a +1/+1 counter on this card."
Aang, Airbending Master79%
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"Whenever one or more creatures you control leave the battlefield without dying, you get an experience counter."
Solemn Recruit79%
$0.16↓#16126↑0.05↓9.7 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%
$0.16↓#18673↑0.07↓4.9 years↑
"Vigilance"
Faithful Watchdog78%
$0.19↓#8980↑0.00↓2.3 years↑
"Vigilance"
Armasaur Guide76%
$0.09↓#17861↑0.06↓1.9 years↑
"Vigilance"
Costume Closet75%
$0.22↑#10462↑0.00↓1.1 years
"Whenever a modified creature you control leaves the battlefield, put a +1/+1 counter on this artifact."
Tokka & Rahzar, Unsupervised75%
$0.30↑#11705↑0.180.6 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%
$0.49↑#9851↑0.330.6 years
"Whenever a creature you control leaves the battlefield, if it had a counter on it, you gain 2 life."
Boomer Scrapper74%
$0.27↑#12327↑0.252.6 years↑
"Whenever a token you control leaves the battlefield, put a +1/+1 counter on this creature."
Twilight Drover73%
$0.24↑#6721↑0.16↓21.2 years↑
"Whenever a creature token leaves the battlefield, put a +1/+1 counter on this creature."
Splinter, the Mentor73%
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"Whenever this card or another nontoken creature you control leaves the battlefield, create a Mutagen token."
Atlantean Cavalry73%
$0.11↓#19700↑0.210.3 years
"Vigilance"
Lakeshore Apothecary73%
$0.05↓#20234↑0.07↓0.2 years
"Vigilance"