Plague Mare {1}{B}{B}
Creature — Nightmare Horse
This creature can't be blocked by white creatures.
When this creature enters, creatures your opponents control get -1/-1 until end of turn.
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Cards that do something similar expected a card that isn't here?
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Night Clubber 100%
$0.23#12991
"When this creature enters, creatures your opponents control get -1/-1 until end of turn."
Archfiend of Sorrows 98%
$0.22#14735
"When this creature enters, creatures your opponents control get -2/-2 until end of turn."
Massacre Wurm 98%
$1.26#513
"When this creature enters, creatures your opponents control get -2/-2 until end of turn."
Sea Hag // Aquatic Ingress 98%
$0.08#17012
"When this creature enters, creatures your opponents control get -4/-0 until end of turn."
Mouth of the Storm 95%
$0.10#23018
"When this creature enters, creatures your opponents control get -3/-0 until your next turn."
Kessig Prowler // Sinuous Predator 87%
$0.18#21874
"This creature can't be blocked by more than one creature."