Festering Goblin 
Creature — Zombie Goblin
When this creature dies, target creature gets -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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Disease Carriers 97%
$0.13#25356
"When this creature dies, target creature gets -2/-2 until end of turn."
Hornet Harasser 97%
$0.12#28891
"When this creature dies, target creature gets -2/-2 until end of turn."
Undead Executioner 94%
$0.07#29441
"When this creature dies, you may have target creature get -2/-2 until end of turn."
Slaughterhouse Bouncer 91%
$0.03#30740
"When this creature dies, if you have no cards in hand, target creature gets -3/-3 until end of turn."
Gnawing Vermin 87%
$0.33#9740
"When this creature dies, target creature you don't control gets -1/-1 until end of turn."
Splatter Goblin 81%
$0.12#25311
"When this creature dies, target creature an opponent controls gets -1/-1 until end of turn."
Shambling Goblin 81%
$0.17#21058
"When this creature dies, target creature an opponent controls gets -1/-1 until end of turn."
Grim Physician 81%
$0.18#21871
"When this creature dies, target creature an opponent controls gets -1/-1 until end of turn."