Call for Blood 
Instant — Arcane
$0.09 #29155 0.12 21.7 years
As an additional cost to cast this spell, sacrifice a creature.
Target creature gets -X/-X until end of turn, where X is the sacrificed creature's power.
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Tormented Thoughts95%
$0.05↓#233620.38↑12.5 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Tend the Pests94%
$0.52↑#5162↑0.53↑5.5 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Bone Splinters94%
$0.07↓#6031↑0.1118.0 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Ichor Explosion91%
$0.11↑#285050.0715.4 years↓
"All creatures get -X/-X until end of turn, where X is the sacrificed creature's power."
+1 more matching line
Vicious Betrayal91%
$0.20↑#289460.1622.4 years
"As an additional cost to cast this spell, sacrifice any number of creatures."
Life's Legacy90%
$4.90↑#2545↑0.31↑12.3 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Launch Party90%
$0.14↑#264450.0514.0 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Worthy Cost90%
$0.22↑#5605↑0.121.5 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Demon of Catastrophes88%
$0.30↑#15401↑0.058.3 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Tendrils of Despair88%
$0.15↑#270510.67↑29.4 years↑
"As an additional cost to cast this spell, sacrifice a creature."
Severed Strands87%
$0.08↓#13130↑0.078.0 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Momentous Fall87%
$3.72↑#2596↑0.22↑16.5 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Fiery Conclusion86%
$0.05↓#23294↑0.1221.0 years
"As an additional cost to cast this spell, sacrifice a creature."
Ritual of the Machine86%
$10.01↑#18287↑0.28↑30.4 years↑
"As an additional cost to cast this spell, sacrifice a creature."
Carrion86%
$3.51↑#16339↑0.00↓30.0 years↑
"As an additional cost to cast this spell, sacrifice a creature."
Goremand86%
$0.18↑#14112↑0.41↑6.3 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Death Bomb86%
$0.14↑#289470.1925.7 years↑
"As an additional cost to cast this spell, sacrifice a creature."
Corrupted Conviction85%
$0.35↑#601↑0.093.5 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Village Rites85%
$0.33↑#202↑0.096.3 years↓
"As an additional cost to cast this spell, sacrifice a creature."
Skulltap85%
$0.16↑#19209↑0.00↓23.4 years↑
"As an additional cost to cast this spell, sacrifice a creature."