Hapatra, Vizier of Poisons 
Legendary Creature — Human Cleric
$0.28 #3936 0.50 9.4 years
Whenever Hapatra deals combat damage to a player, you may put a -1/-1 counter on target creature.
Whenever you put one or more -1/-1 counters on a creature, create a 1/1 green Snake creature token with deathtouch.
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Cards similar to Hapatra, Vizier of Poisons expected a card that isn't here?
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Obelisk Spider89%
$3.17↑#4844↓0.06↓9.1 years
"Whenever this creature deals combat damage to a creature, put a -1/-1 counter on that creature."
+1 more matching line
Nest of Scarabs88%
$6.50↑#34950.17↓9.4 years
"Whenever you put one or more -1/-1 counters on a creature, create that many 1/1 black Insect creature tokens."
Flourishing Defenses88%
$0.89↑#39310.07↓18.3 years↑
"Whenever a -1/-1 counter is put on a creature, you may create a 1/1 green Elf Warrior creature token."
Banewhip Punisher87%
$0.29↑#10977↓0.00↓9.1 years
"When this creature enters, you may put a -1/-1 counter on target creature."
+1 more matching line
Blowfly Infestation87%
$0.37↑#3092↑0.29↓18.3 years↑
"Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature."
Gnarled Effigy84%
$0.18↓#27488↓0.24↓18.3 years↑
"
, 
: Put a -1/-1 counter on target creature."
, : Put a -1/-1 counter on target creature."
Spitting Dilophosaurus84%
$26.78↑#5609↓0.78↑2.8 years↓
"Whenever this creature enters or attacks, put a -1/-1 counter on up to one target creature."
Cultbrand Cinder82%
$0.11↓#30299↓0.00↓18.3 years↑
"When this creature enters, put a -1/-1 counter on target creature."
Skinrender82%
$0.17↓#5738↓0.4015.9 years↑
"When this creature enters, put three -1/-1 counters on target creature."
Grief Tyrant82%
$0.16↓#25986↓0.4218.3 years↑
"This creature enters with four -1/-1 counters on it."
Crumbling Ashes81%
$27.70↑#6709↓0.79↑18.1 years↑
"At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it."
Scar80%
$0.23↓#19614↓0.29↓18.3 years↑
"Put a -1/-1 counter on target creature."
The Scorpion God80%
$0.29↑#5217↓0.08↓9.4 years
"
: Put a -1/-1 counter on another target creature."
: Put a -1/-1 counter on another target creature."+1 more matching line
Soulstinger80%
$0.12↓#19695↓0.00↓9.4 years
"When this creature enters, put two -1/-1 counters on target creature you control."
Blight Rot80%
$0.25↓#9217↓0.00↓0.6 years↓
"Put four -1/-1 counters on target creature."
Weed-Pruner Poplar79%
$0.15↓#26274↓0.29↓18.6 years↑
"At the beginning of your upkeep, target creature other than this creature gets -1/-1 until end of turn."
Liliana, Death Wielder79%
$0.40↑#7954↓0.72↑9.4 years
"+2: Put a -1/-1 counter on up to one target creature."
+1 more matching line
Volrath, the Shapestealer78%
$0.68↑#13602↓0.507.0 years↓
"At the beginning of combat on your turn, put a -1/-1 counter on up to one target creature."
Fevered Convulsions78%
$0.66↑#22324↓0.4228.9 years↑
"
: Put a -1/-1 counter on target creature."
: Put a -1/-1 counter on target creature."
Instill Infection77%
$0.11↓#23712↓0.07↓15.9 years↑
"Put a -1/-1 counter on target creature."