Nightmare Sower 
Creature — Faerie Assassin
$0.29 #13107 0.15 0.7 years
Flying, lifelink
Whenever you cast a spell during an opponent's turn, put a -1/-1 counter on up to one target creature.
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Cards similar to Nightmare Sower expected a card that isn't here?
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Dream Spoilers96%
$0.14↓#19623↓0.25↑3.1 years↑
"Whenever you cast a spell during an opponent's turn, up to one target creature an opponent controls gets -1/-1 until end of turn."
Dreamspoiler Witches94%
$0.24↓#23540↓0.1119.0 years↑
"Whenever you cast a spell during an opponent's turn, you may have target creature get -1/-1 until end of turn."
Gnarled Effigy82%
$0.15↓#27769↓0.0718.5 years↑
"
, 
: Put a -1/-1 counter on target creature."
, : Put a -1/-1 counter on target creature."
Seraph of Dawn80%
$0.13↓#146250.00↓14.5 years↑
"Flying, lifelink"
Healer's Flock80%
$0.25↓#17726↓0.075.3 years↑
"Flying, lifelink"
Insatiable Harpy80%
$0.06↓#27403↓0.1113.1 years↑
"Flying, lifelink"
Blightcaster80%
$0.14↓#17345↓0.1013.3 years↑
"Whenever you cast an enchantment spell, you may have target creature get -2/-2 until end of turn."
Dreamstalker Manticore80%
$0.12↓#26946↓0.126.7 years↑
"Whenever you cast your first spell during each opponent's turn, this creature deals 1 damage to any target."
Vish Kal, Blood Arbiter79%
$0.61↑#16351↓0.1315.3 years↑
"Flying, lifelink"
Cultbrand Cinder78%
$0.11↓#30659↓0.00↓18.5 years↑
"When this creature enters, put a -1/-1 counter on target creature."
Skinrender78%
$0.23↓#5692↑0.69↑16.1 years↑
"When this creature enters, put three -1/-1 counters on target creature."
Blight Rot78%
$0.28↓#8917↑0.04↓0.7 years
"Put four -1/-1 counters on target creature."
Weed-Pruner Poplar78%
$0.14↓#26750↓0.1218.7 years↑
"At the beginning of your upkeep, target creature other than this creature gets -1/-1 until end of turn."
Scar77%
$0.23↓#19802↓0.1918.5 years↑
"Put a -1/-1 counter on target creature."
Gisela, the Broken Blade77%
$22.26↑#2542↑0.32↑10.2 years↑
"Flying, first strike, lifelink"
Brineborn Cutthroat76%
$0.17↓#10386↑0.127.3 years↑
"Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on this creature."
Aerial Responder76%
$0.12↓#8768↑0.00↓10.1 years↑
"Flying, vigilance, lifelink"
Fevered Convulsions76%
$0.70↑#22859↓0.0629.0 years↑
"
: Put a -1/-1 counter on target creature."
: Put a -1/-1 counter on target creature."
Blowfly Infestation75%
$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."
Flensermite75%
$0.27↓#123190.1915.7 years↑
"Lifelink"