Foundry Hornet 
Creature — Insect
$0.25 #25395 0.33 9.6 years
Flying
When this creature enters, if you control a creature with a +1/+1 counter on it, creatures your opponents control get -1/-1 until end of turn.
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Plague Mare88%
$0.29↑#15489↑0.378.1 years↓
"When this creature enters, creatures your opponents control get -1/-1 until end of turn."
Cower in Fear88%
$0.14↓#15508↑0.16↓14.1 years↑
"Creatures your opponents control get -1/-1 until end of turn."
Make Obsolete88%
$0.12↓#15167↑0.12↓9.9 years
"Creatures your opponents control get -1/-1 until end of turn."
Night Clubber86%
$0.22↓#13720↑0.75↑4.4 years↓
"When this creature enters, creatures your opponents control get -1/-1 until end of turn."
Enduring Scalelord85%
$0.13↓#11165↑0.20↓11.4 years↑
"Flying"
Massacre Wurm84%
$1.69↑#512↑0.80↑15.6 years↑
"When this creature enters, creatures your opponents control get -2/-2 until end of turn."
Minister of Pain84%
$0.13↓#260670.07↓11.4 years↑
"When this creature exploits a creature, creatures your opponents control get -1/-1 until end of turn."
Sephiroth, Planet's Heir84%
$0.63↑#10981↑0.55↑1.2 years↓
"When this card enters, creatures your opponents control get -2/-2 until end of turn."
Arms of Hadar84%
$0.44↑#20205↑0.404.2 years↓
"Creatures target player controls get -2/-2 until end of turn."
Suffocating Fumes82%
$0.20↓#14895↑0.436.4 years↓
"Creatures your opponents control get -1/-1 until end of turn."
Phyrexian Debaser82%
$0.04↓#288720.05↓27.6 years↑
"Flying"
Seeker's Folly80%
$0.12↓#14322↑0.21↓1.8 years↓
"• Creatures your opponents control get -1/-1 until end of turn."
Hazardous Conditions80%
$0.05↓#287180.389.9 years
"Creatures with no counters on them get -2/-2 until end of turn."
Archfiend of Sorrows80%
$0.09↓#15000↑0.63↑5.2 years↓
"When this creature enters, creatures your opponents control get -2/-2 until end of turn."
Shrouded Shepherd // Cleave Shadows79%
$0.19↓#233280.00↓3.0 years↓
"Creatures your opponents control get -1/-1 until end of turn."
Gruesome Realization78%
$0.23↓#10254↑0.00↓3.8 years↓
"• Creatures your opponents control get -1/-1 until end of turn."
Gnashing of Teeth78%
$0.18↓#216000.00↓0.1 years↓
"• Creatures target player controls get -1/-1 until end of turn."
Siege Dragon78%
$0.34↑#15989↑0.2412.1 years↑
"Flying"
Thousand Winds78%
$0.13↓#11112↑0.48↑12.0 years↑
"Flying"
Wail of War76%
$0.15↓#14377↑0.21↓1.4 years↓
"• Creatures target opponent controls get -1/-1 until end of turn."