Dream Spoilers 
Creature — Faerie Warlock
$0.15 #19257 0.12 3.0 years
Flying
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.
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Dreamspoiler Witches99%
$0.26↑#23206↓0.29↑18.9 years↑
"Whenever you cast a spell during an opponent's turn, you may have target creature get -1/-1 until end of turn."
Nightmare Sower96%
$0.22↑#13295↑0.00↓0.6 years↓
"Whenever you cast a spell during an opponent's turn, put a -1/-1 counter on up to one target creature."
Voracious Tome-Skimmer91%
$0.30↑#7588↑0.00↓0.6 years↓
"Flying"
Mischievous Chimera90%
$0.09↓#199030.40↑6.6 years↑
"Flying"
Blightcaster86%
$0.13↓#169490.1813.1 years↑
"Whenever you cast an enchantment spell, you may have target creature get -2/-2 until end of turn."
Dreamstalker Manticore84%
$0.12↓#26487↓0.41↑6.6 years↑
"Whenever you cast your first spell during each opponent's turn, this creature deals 1 damage to any target."
Alela, Cunning Conqueror84%
$13.72↑#3461↑0.80↑3.0 years
"Flying"
Weed-Pruner Poplar82%
$0.15#26274↓0.29↑18.6 years↑
"At the beginning of your upkeep, target creature other than this creature gets -1/-1 until end of turn."
Phyrexian Debaser82%
$0.04↓#28872↓0.0527.6 years↑
"Flying"
Necropolis Fiend82%
$0.19↑#174260.1511.9 years↑
"Flying"
Glen Elendra Pranksters79%
$0.31↑#180140.32↑18.9 years↑
"Whenever you cast a spell during an opponent's turn, you may return target creature you control to its owner's hand."
Grandmother Sengir78%
$1.09↑#29343↓0.27↑30.9 years↑
"
, 
: Target creature gets -1/-1 until end of turn."
, : Target creature gets -1/-1 until end of turn."
Shefet Archfiend78%
$0.23↑#160650.161.6 years↓
"Flying"
Orc Sureshot76%
$0.20↑#165300.29↑11.6 years↑
"Whenever another creature you control enters, target creature an opponent controls gets -1/-1 until end of turn."
Shivan Hellkite76%
$0.26↑#194600.29↑27.9 years↑
"Flying"
Breath of the Sleepless76%
$0.28↑#14654↑0.124.8 years↑
"Whenever you cast a creature spell during an opponent's turn, tap up to one target creature."
Keening Banshee75%
$0.12↓#27308↓0.00↓21.0 years↑
"When this creature enters, target creature gets -2/-2 until end of turn."
+1 more matching line
Hagra Sharpshooter75%
$0.05↓#29873↓0.00↓10.9 years↑
"
: Target creature gets -1/-1 until end of turn."
: Target creature gets -1/-1 until end of turn."
Smokespew Invoker75%
$0.14↓#30873↓0.47↑23.6 years↑
"
: Target creature gets -3/-3 until end of turn."
: Target creature gets -3/-3 until end of turn."
Disciple of Tevesh Szat74%
$0.11↓#29488↓0.28↑20.1 years↑
": Target creature gets -1/-1 until end of turn."
: Target creature gets -1/-1 until end of turn."