Sinister Cryologist {2}{U}
Creature — Jellyfish Wizard
When this creature enters, target creature an opponent controls gets -3/-0 until end of turn.
Warp {U} (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.)
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Cards that do something similar expected a card that isn't here?
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Black Dragon 100%
$0.23#15235
"When this creature enters, target creature an opponent controls gets -3/-3 until end of turn."
Ambush Gigapede 97%
$0.10#19924
"When this creature enters, target creature an opponent controls gets -2/-2 until end of turn."
+1 more matching line
Burrog Befuddler 97%
$0.17#15670
"When this creature enters, target creature an opponent controls gets -1/-0 until end of turn."
+1 more matching line
Tooth Collector 96%
$0.07#24915
"When this creature enters, target creature an opponent controls gets -1/-1 until end of turn."
Eyeblight Assassin 96%
$0.14#21324
"When this creature enters, target creature an opponent controls gets -1/-1 until end of turn."
Skulking Killer 95%
$0.11#24728
"When this creature enters, target creature an opponent controls gets -2/-2 until end of turn if that opponent controls no other creatures."
Threnody Singer 95%
$0.06#25838
"When this creature enters, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue."
Chupacabra Echo 95%
$0.19#12960
"When this creature enters, target creature an opponent controls gets -X/-X until end of turn, where X is the number of permanent cards in your graveyard."
Blight-Breath Catoblepas 95%
$0.10#24278
"When this creature enters, target creature an opponent controls gets -X/-X until end of turn, where X is your devotion to black."
Poisoner's Apprentice 94%
$0.11#24974
"When this creature enters, target creature an opponent controls gets -4/-4 until end of turn if you gained life this turn."
Blitz Leech 93%
$0.15#25058
"When this creature enters, target creature an opponent controls gets -2/-2 until end of turn. Remove all counters from that creature."
+1 more matching line
Cogwork Wrestler 92%
$0.17#19235
"When this creature enters, target creature an opponent controls gets -2/-0 until end of turn."
+1 more matching line
Brinebarrow Intruder 92%
$0.18#23536
"When this creature enters, target creature an opponent controls gets -2/-0 until end of turn."
Faerie Duelist 92%
$0.10#19352
"When this creature enters, target creature an opponent controls gets -2/-0 until end of turn."
Humbling Elder 92%
$0.06#21910
"When this creature enters, target creature an opponent controls gets -2/-0 until end of turn."
Tragic Banshee 92%
$0.14#19852
"When this creature enters, target creature an opponent controls gets -1/-1 until end of turn. If a creature died this turn, that creature gets -13/-13 until end of turn instead."
Drana's Silencer 92%
$0.06#24638
"When this creature enters, target creature an opponent controls gets -X/-X until end of turn, where X is the number of creatures in your party."
Vengeful Rebel 87%
$0.04#27965
"When this creature enters, if a permanent left the battlefield under your control this turn, target creature an opponent controls gets -3/-3 until end of turn."
Ubul Sar Gatekeepers 83%
$0.08#25580
"When this creature enters, if you control two or more Gates, target creature an opponent controls gets -2/-2 until end of turn."