Slaughter Specialist 
Creature — Vampire Warrior
$0.79 #4645 0.06 4.9 years
When this creature enters, each opponent creates a 1/1 white Human creature token.
Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature.
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Cards similar to Slaughter Specialist expected a card that isn't here?
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"Whenever a creature an opponent controls dies, put a +1/+1 counter on this card."
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"Whenever a creature an opponent controls dies, put a +1/+1 counter on this card."
Kraven the Hunter84%
$0.25↓#14297↓0.47↑1.0 years↓
"Whenever a creature an opponent controls with the greatest power among creatures that player controls dies, draw a card and put a +1/+1 counter on this card."
Lumberknot83%
$0.11↓#15284↓0.25↑14.9 years↑
"Whenever a creature dies, put a +1/+1 counter on this creature."
Algae Gharial83%
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"Whenever another creature dies, you may put a +1/+1 counter on this creature."
Rockslide Elemental83%
$0.15↓#23966↓0.47↑17.9 years↑
"Whenever another creature dies, you may put a +1/+1 counter on this creature."
Fire Nation Sentinels83%
$0.47↓#16449↓0.000.8 years↓
"Whenever a nontoken creature an opponent controls dies, put a +1/+1 counter on each creature you control."
Swarm of Bloodflies82%
$0.09↓#13737↓0.50↑11.9 years↑
"Whenever another creature dies, put a +1/+1 counter on this creature."
Scavenger Drake82%
$0.18↓#22233↓0.40↑17.9 years↑
"Whenever another creature dies, you may put a +1/+1 counter on this creature."
Sengir Connoisseur82%
$0.21↓#20360↓0.004.0 years
"Whenever one or more other creatures die, put a +1/+1 counter on this creature. This ability triggers only once each turn."
Rot Shambler81%
$0.17↓#13578↓0.0010.9 years↑
"Whenever another creature you control dies, put a +1/+1 counter on this creature."
Unruly Mob81%
$0.08↓#17858↓0.0014.9 years↑
"Whenever another creature you control dies, put a +1/+1 counter on this creature."
Gavony Unhallowed81%
$0.08↓#19717↓0.87↑10.1 years↑
"Whenever another creature you control dies, put a +1/+1 counter on this creature."
Vengeful Townsfolk81%
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"Whenever one or more other creatures you control die, put a +1/+1 counter on this creature."
Hunted Lammasu81%
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"When this creature enters, target opponent creates a 4/4 black Horror creature token."
Thanos, Death's Consort80%
$2.20↑#18354↓0.000.2 years↓
"Whenever another creature dies, put a +1/+1 counter on this card."
Guardian Kirin80%
$0.11↓#24342↓0.50↑5.2 years
"Whenever another creature you control dies, put a +1/+1 counter on this creature."
Hunted Phantasm80%
$3.90↑#12354↓0.0020.9 years↑
"When this creature enters, target opponent creates five 1/1 red Goblin creature tokens."