Clutch of Undeath 
Enchantment — Aura
$0.11 #29660 0.35 23.4 years
Enchant creature
Enchanted creature gets +3/+3 as long as it's a Zombie. Otherwise, it gets -3/-3.
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Noxious Ghoul85%
$0.46↑#4317↑0.61↑23.7 years
"Whenever this creature or another Zombie enters, all non-Zombie creatures get -1/-1 until end of turn."
Mishra's Domination85%
$0.08↓#23501↑0.07↓3.9 years↓
"Enchant creature"
Nyx Infusion78%
$0.06↓#296060.11↓12.5 years↓
"Enchanted creature gets +2/+2 as long as it's an enchantment. Otherwise, it gets -2/-2."
Gift of Fangs78%
$0.20↑#14834↑0.13↓4.9 years↓
"Enchanted creature gets +2/+2 as long as it's a Vampire. Otherwise, it gets -2/-2."
Serra's Boon78%
$0.22↑#296770.06↓19.7 years↓
"Enchanted creature gets +1/+2 as long as it's white. Otherwise, it gets -2/-1."
Dog Umbra78%
$0.21↑#7182↑0.282.3 years↓
"Enchant creature"
Feeding Frenzy74%
$0.19↑#240480.12↓24.0 years
"Target creature gets -X/-X until end of turn, where X is the number of Zombies on the battlefield."
Phyrexian Boon72%
$0.09↓#304350.10↓30.4 years↑
"Enchanted creature gets +2/+1 as long as it's black. Otherwise, it gets -1/-2."
Tahngarth's Rage72%
$0.18↑#269400.12↓29.0 years↑
"Enchanted creature gets +3/+0 as long as it's attacking. Otherwise, it gets -2/-1."
Paroxysm72%
$0.20↑#311580.06↓28.3 years↑
"Enchant creature"
Tall as a Beanstalk72%
$0.10↓#23434↑0.06↓7.0 years↓
"Enchant creature"
Impending Doom70%
$0.10↓#250290.00↓6.7 years↓
"Enchant creature"
Vow of Wildness70%
$0.23↑#10559↑0.06↓15.3 years↓
"Enchant creature"
Drake Umbra70%
$0.19↑#15077↑0.19↓16.5 years↓
"Enchant creature"
Mammoth Umbra70%
$0.24↑#12936↑0.18↓16.5 years↓
"Enchant creature"