Plague Fiend 
Creature — Insect
$0.18 #25874 0.57 26.3 years
Whenever this creature deals combat damage to a creature, destroy that creature unless its controller pays 
.
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Voracious Cobra90%
$0.27↑#271600.12↓25.9 years
"Whenever this creature deals combat damage to a creature, destroy that creature."
Lowland Basilisk83%
$0.13↓#309180.00↓28.5 years↑
"Whenever this creature deals damage to a creature, destroy that creature at end of combat."
Stinkweed Imp82%
$1.12↑#3104↑0.45↓20.9 years↓
"Whenever this creature deals combat damage to a creature, destroy that creature."
Creepy Doll82%
$0.90↑#8956↑0.38↓14.9 years↓
"Whenever this creature deals combat damage to a creature, flip a coin. If you win the flip, destroy that creature."
Serpentine Basilisk80%
$0.17↓#268800.05↓23.9 years↓
"Whenever this creature deals combat damage to a creature, destroy that creature at end of combat."
Ohran Viper80%
$1.35↑#7747↑0.19↓20.1 years↓
"Whenever this creature deals combat damage to a creature, destroy that creature at end of combat."
Venomous Fangs80%
$0.12↓#247660.25↓27.9 years↑
"Whenever enchanted creature deals damage to a creature, destroy the other creature."
Death Charmer80%
$0.10↓#288060.12↓26.3 years
"Whenever this creature deals combat damage to a creature, that creature's controller loses 2 life unless they pay ."
."
Dripping Dead80%
$0.16↓#306300.33↓23.6 years↓
"Whenever this creature deals combat damage to a creature, destroy that creature. It can't be regenerated."
Stone-Tongue Basilisk76%
$0.40↑#261570.33↓25.0 years↓
"Whenever this creature deals combat damage to a creature, destroy that creature at end of combat."
Soul Charmer75%
$0.12↓#297300.00↓26.3 years
"Whenever this creature deals combat damage to a creature, you gain 2 life unless that creature's controller pays ."
."
Mephitic Ooze74%
$0.62↑#249790.26↓22.6 years↓
"Whenever this creature deals combat damage to a creature, destroy that creature. The creature can't be regenerated."
Green Dragon74%
$0.21↑#13907↑0.35↓5.1 years↓
"When this creature enters, until end of turn, whenever a creature an opponent controls is dealt damage, destroy it."
Simic Basilisk70%
$0.15↓#269950.44↓20.3 years↓
"
: Until end of turn, target creature with a +1/+1 counter on it gains "Whenever this creature deals combat damage to a creature, destroy that creature at end of combat.""
: Until end of turn, target creature with a +1/+1 counter on it gains "Whenever this creature deals combat damage to a creature, destroy that creature at end of combat.""
Death Pits of Rath70%
$0.91↑#19052↑0.43↓28.9 years↑
"Whenever a creature is dealt damage, destroy it. It can't be regenerated."