Urge to Feed 
Instant
$0.17 #11894 0.12 16.7 years
Target creature gets -3/-3 until end of turn. You may tap any number of untapped Vampire creatures you control. If you do, put a +1/+1 counter on each of those Vampires.
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Olivia's Wrath83%
$0.44↑#2879↑0.56↑4.9 years↓
"Each non-Vampire creature gets -X/-X until end of turn, where X is the number of Vampires you control."
Sanguine Glorifier80%
$0.09↓#26770↓0.068.8 years↓
"When this creature enters, put a +1/+1 counter on another target Vampire you control."
Stromkirk Mentor80%
$0.05↓#25649↓0.00↓10.5 years↓
"When this creature enters, put a +1/+1 counter on another target Vampire you control."
Chosen of Markov // Markov's Servant80%
$0.06↓#23527↓0.00↓14.7 years↓
"
, Tap an untapped Vampire you control: Transform this creature."
, Tap an untapped Vampire you control: Transform this creature."
Gift of Fangs78%
$0.20↑#14834↓0.134.9 years↓
"Enchanted creature gets +2/+2 as long as it's a Vampire. Otherwise, it gets -2/-2."
Anointed Deacon77%
$0.14↓#25253↓0.129.1 years↓
"At the beginning of combat on your turn, you may have target Vampire get +2/+0 until end of turn."
Blood Tribute76%
$5.08↑#6174↑1.11↑17.0 years
"Kicker—Tap an untapped Vampire you control."
New Blood73%
$0.30↑#4493↑0.44↑9.2 years↓
"As an additional cost to cast this spell, tap an untapped Vampire you control."
Death Wind72%
$0.07↓#17443↓0.0714.5 years↓
"Target creature gets -X/-X until end of turn."
Disfigure72%
$0.05↓#16432↓0.1417.0 years
"Target creature gets -2/-2 until end of turn."
Stab72%
$0.20↑#109740.151.9 years↓
"Target creature gets -2/-2 until end of turn."
Fatal Fumes72%
$0.07↓#28849↓0.1213.5 years↓
"Target creature gets -4/-2 until end of turn."
Tar Snare72%
$0.03↓#29751↓0.00↓10.7 years↓
"Target creature gets -3/-2 until end of turn."
Last Gasp72%
$0.05↓#15840↓0.00↓21.0 years↑
"Target creature gets -3/-3 until end of turn."
Strangling Spores72%
$0.10↓#29489↓0.00↓8.3 years↓
"Target creature gets -3/-3 until end of turn."
Markov Retribution71%
$0.08↓#21573↓0.064.9 years↓
"• Target Vampire you control deals damage equal to its power to another target creature."
Whisper of the Dross71%
$0.34↑#3712↑0.083.7 years↓
"Target creature gets -1/-1 until end of turn. Proliferate."
Duskborne Skymarcher70%
$0.30↑#19014↓0.00↓9.1 years↓
"
, : Target attacking Vampire gets +1/+1 until end of turn."
, : Target attacking Vampire gets +1/+1 until end of turn."
Deathless Ancient70%
$0.18↑#26642↓0.00↓9.1 years↓
"Tap three untapped Vampires you control: Return this card from your graveyard to your hand."
Scorpion's Sting70%
$0.18↑#140390.27↑1.1 years↓
"Target creature gets -3/-3 until end of turn."