Rust Elemental 
Artifact Creature — Elemental
$2.89 #6926 0.37 22.9 years
Flying
At the beginning of your upkeep, sacrifice another artifact. If you can't, tap this creature and you lose 4 life.
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Cards similar to Rust Elemental expected a card that isn't here?
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Yawgmoth Demon93%
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"At the beginning of your upkeep, you may sacrifice an artifact. If you don't, tap this creature and it deals 2 damage to you."
Ravenous Vampire85%
$0.16↓#31477↓0.4429.9 years↑
"At the beginning of your upkeep, you may sacrifice a nonartifact creature. If you do, put a +1/+1 counter on this creature. If you don't, tap this creature."
Devouring Sugarmaw // Have for Dinner84%
$0.19↓#21333↓0.473.0 years↓
"At the beginning of your upkeep, you may sacrifice an artifact, enchantment, or token. If you don't, tap this creature."
Cloudsculpt Technician80%
$0.04↓#24549↓0.14↓1.1 years↓
"Flying"
Lord of the Pit80%
$0.42↓#13006↓0.4133.1 years↑
"At the beginning of your upkeep, sacrifice a creature other than this creature. If you can't, this creature deals 7 damage to you."
Apocalypse Demon78%
$0.27↓#15704↓0.53↑9.1 years↓
"At the beginning of your upkeep, tap this creature unless you sacrifice another creature."
Xathrid Demon78%
$0.46↓#18204↓0.20↓17.1 years↓
"At the beginning of your upkeep, sacrifice a creature other than this creature, then each opponent loses life equal to the sacrificed creature's power. If you can't sacrifice a creature, tap this creature and you lose 7 life."
Living Tsunami78%
$0.12↓#29367↓0.2716.9 years↓
"Flying"
Phantasmal Forces78%
$0.20↓#31171↓0.2933.1 years↑
"Flying"
Liege of the Pit76%
$0.76↓#16604↓0.00↓19.9 years↓
"At the beginning of your upkeep, sacrifice a creature other than this creature. If you can't, this creature deals 7 damage to you."
Demonic Appetite76%
$0.10↓#25436↓0.4416.4 years↓
"At the beginning of your upkeep, sacrifice a creature."
Abhorrent Overlord76%
$0.49↓#59250.2913.0 years↓
"At the beginning of your upkeep, sacrifice a creature."
+1 more matching line
Minion of Leshrac75%
$0.97↓#23833↓0.19↓31.3 years↑
"At the beginning of your upkeep, this creature deals 5 damage to you unless you sacrifice a creature other than this creature. If this creature deals damage to you this way, tap it."
Vulshok War Boar74%
$0.10↓#31337↓0.20↓22.6 years
"When this creature enters, sacrifice it unless you sacrifice an artifact."
Demonic Taskmaster74%
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"At the beginning of your upkeep, sacrifice a creature other than this creature."
Oni Possession74%
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"At the beginning of your upkeep, sacrifice a creature."
Ravenous Demon // Archdemon of Greed74%
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"At the beginning of your upkeep, sacrifice a Human. If you can't, tap this creature and it deals 9 damage to you."
Kuldotha Rebirth74%
$0.25↓#13389↓0.23↓15.9 years↓
"As an additional cost to cast this spell, sacrifice an artifact."
Devouring Strossus74%
$0.81↓#21181↓0.00↓25.9 years↑
"At the beginning of your upkeep, sacrifice a creature."
Zanam Djinn72%
$0.18↓#31433↓0.00↓25.9 years↑
"Flying"