Sickening Shoal 
Instant — Arcane
$8.98 #19615 0.12 21.7 years
You may exile a black card with mana value X from your hand rather than pay this spell's mana cost.
Target creature gets -X/-X until end of turn.
Click a line or tag to filter
Cards similar to Sickening Shoal expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Unmask88%
$6.25↓#180700.52↑27.0 years↑
"You may exile a black card from your hand rather than pay this spell's mana cost."
Induce Despair86%
$0.07↓#28569↓0.1116.5 years↓
"Target creature gets -X/-X until end of turn, where X is the revealed card's mana value."
+1 more matching line
Pull Under86%
$0.09↓#30429↓0.1222.1 years
"Target creature gets -5/-5 until end of turn."
Demon's Grasp86%
$0.13↓#27428↓0.00↓11.0 years↓
"Target creature gets -5/-5 until end of turn."
Throttle86%
$0.05↓#28982↓0.32↑12.1 years↓
"Target creature gets -4/-4 until end of turn."
Dark Deed86%
$0.21↓#168280.130.3 years↓
"Target creature gets -4/-4 until end of turn."
Grasp of Darkness86%
$0.09↓#11722↑0.24↑16.1 years↓
"Target creature gets -4/-4 until end of turn."
Lash of the Whip86%
$0.03↓#29073↓0.0613.1 years↓
"Target creature gets -4/-4 until end of turn."
Flatten86%
$0.05↓#28740↓0.00↓11.6 years↓
"Target creature gets -4/-4 until end of turn."
Eyes of the Beholder86%
$0.18↓#216720.065.2 years↓
"Target creature gets -11/-11 until end of turn."
Soul Spike86%
$17.57↑#25844↓0.0620.2 years↓
"You may exile two black cards from your hand rather than pay this spell's mana cost."
Collective Nightmare86%
$0.04↓#23812↓0.063.5 years↓
"Target creature gets -3/-3 until end of turn."
Overkill86%
$0.31↓#2112↑0.32↑1.4 years↓
"Target creature gets -0/-9999 until end of turn."
Darkblast84%
$0.35↓#10133↑0.0721.0 years
"Target creature gets -1/-1 until end of turn."
Blazing Shoal84%
$3.34↓#14369↑0.1621.7 years
"You may exile a red card with mana value X from your hand rather than pay this spell's mana cost."
Scent of Nightshade84%
$0.12↓#29599↓0.0627.4 years↑
"Reveal any number of black cards in your hand. Target creature gets -X/-X until end of turn, where X is the number of cards revealed this way."
Force of Despair84%
$6.37↓#2454↑0.77↑7.4 years↓
"If it's not your turn, you may exile a black card from your hand rather than pay this spell's mana cost."
Contagion84%
$0.27↓#12823↑0.2030.4 years↑
"You may pay 1 life and exile a black card from your hand rather than pay this spell's mana cost."
Blight-Breath Catoblepas84%
$0.09↓#25030↓0.00↓6.7 years↓
"When this creature enters, target creature an opponent controls gets -X/-X until end of turn, where X is your devotion to black."
Death Wind83%
$0.07↓#174430.0714.5 years↓
"Target creature gets -X/-X until end of turn."