Blowfly Infestation 
Enchantment
$0.33 #3048 0.59 18.5 years
Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.
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Cards similar to Blowfly Infestation expected a card that isn't here?
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The Scorpion God88%
$0.26↓#5105↓0.25↓9.5 years↓
"Whenever a creature with a -1/-1 counter on it dies, draw a card."
Hapatra, Vizier of Poisons87%
$0.26↓#3862↓0.34↓9.5 years↓
"Whenever this card deals combat damage to a player, you may put a -1/-1 counter on target creature."
Gnarled Effigy86%
$0.15↓#27769↓0.07↓18.5 years
"
, 
: Put a -1/-1 counter on target creature."
, : Put a -1/-1 counter on target creature."
Banewhip Punisher86%
$0.25↓#11192↓0.06↓9.3 years↓
"When this creature enters, you may put a -1/-1 counter on target creature."
Grief Tyrant85%
$0.15↓#26356↓0.06↓18.5 years
"When this creature dies, put a -1/-1 counter on target creature for each -1/-1 counter on this creature."
Obelisk Spider84%
$2.52↑#4823↓0.22↓9.3 years↓
"Whenever this creature deals combat damage to a creature, put a -1/-1 counter on that creature."
Lockjaw Snapper84%
$1.54↑#16140↓0.18↓18.5 years
"When this creature dies, put a -1/-1 counter on each creature with a -1/-1 counter on it."
Blight Rot83%
$0.28↓#8917↓0.04↓0.7 years↓
"Put four -1/-1 counters on target creature."
Crumbling Ashes82%
$24.83↑#6771↓0.43↓18.2 years
"At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it."
Cultbrand Cinder82%
$0.11↓#30659↓0.00↓18.5 years
"When this creature enters, put a -1/-1 counter on target creature."
Skinrender82%
$0.23↓#5692↓0.6916.1 years↓
"When this creature enters, put three -1/-1 counters on target creature."
Soulstinger82%
$0.18↓#20032↓0.18↓9.5 years↓
"When this creature dies, you may put a -1/-1 counter on target creature for each -1/-1 counter on this creature."
Scar82%
$0.23↓#19802↓0.19↓18.5 years
"Put a -1/-1 counter on target creature."
Liliana, Death Wielder82%
$0.39↑#7854↓0.07↓9.5 years↓
"+2: Put a -1/-1 counter on up to one target creature."
Festering Mummy82%
$0.19↓#12801↓0.00↓9.5 years↓
"When this creature dies, you may put a -1/-1 counter on target creature."
Spitting Dilophosaurus81%
$25.70↑#5728↓0.40↓2.9 years↓
"Whenever this creature enters or attacks, put a -1/-1 counter on up to one target creature."
Weed-Pruner Poplar80%
$0.14↓#26750↓0.12↓18.7 years
"At the beginning of your upkeep, target creature other than this creature gets -1/-1 until end of turn."
Flourishing Defenses79%
$0.47↑#3834↓0.5018.5 years
"Whenever a -1/-1 counter is put on a creature, you may create a 1/1 green Elf Warrior creature token."
Fevered Convulsions79%
$0.70↑#22859↓0.06↓29.0 years↑
": Put a -1/-1 counter on target creature."
: Put a -1/-1 counter on target creature."
Grind // Dust79%
$0.16↓#26674↓0.31↓9.3 years↓
"Put a -1/-1 counter on each of up to two target creatures."