Lithophage 
Creature — Insect
$0.14 #31414 0.00 27.0 years
At the beginning of your upkeep, sacrifice this creature unless you sacrifice a Mountain.
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Cards similar to Lithophage expected a card that isn't here?
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Cosmic Larva94%
$0.38↑#19799↑0.12↑22.4 years↓
"At the beginning of your upkeep, sacrifice this creature unless you sacrifice two lands."
Rathi Dragon92%
$0.40↑#313780.0029.0 years↑
"When this creature enters, sacrifice it unless you sacrifice two Mountains."
Bog Elemental88%
$0.28↑#306810.24↑26.4 years
"At the beginning of your upkeep, sacrifice this creature unless you sacrifice a land."
Polar Kraken88%
$3.66↑#258950.0631.4 years↑
"Cumulative upkeep—Sacrifice a land."
Territorial Dispute87%
$0.43↑#290561.52↑27.0 years
"At the beginning of your upkeep, sacrifice this enchantment unless you sacrifice a land."
Mogg Alarm80%
$0.23↑#19224↑0.0026.7 years
"You may sacrifice two Mountains rather than pay this spell's mana cost."
Psychic Allergy80%
$3.12↑#284230.12↑32.2 years↑
"At the beginning of your upkeep, destroy this enchantment unless you sacrifice two Islands."
The Gitrog Monster79%
$1.26↑#910↑0.85↑10.5 years↓
"At the beginning of your upkeep, sacrifice this card unless you sacrifice a land."
Scythe Tiger78%
$0.15↑#271280.0017.0 years↓
"When this creature enters, sacrifice it unless you sacrifice a land."
Wand of the Elements78%
$0.36↑#306330.56↑22.7 years↓
"
, Sacrifice a Mountain: Create a 3/3 red Elemental creature token."
, Sacrifice a Mountain: Create a 3/3 red Elemental creature token."
Thunderclap78%
$0.18↑#15938↑0.0027.0 years
"You may sacrifice a Mountain rather than pay this spell's mana cost."
Crash78%
$0.23↑#24310↑0.30↑27.0 years
"You may sacrifice a Mountain rather than pay this spell's mana cost."
Pulverize78%
$1.33↑#259480.26↑27.0 years
"You may sacrifice two Mountains rather than pay this spell's mana cost."
Mine Collapse77%
$0.19↑#13344↑0.005.3 years↓
"If it's your turn, you may sacrifice a Mountain rather than pay this spell's mana cost."
Downhill Charge77%
$0.28↑#12393↑0.14↑26.7 years
"You may sacrifice a Mountain rather than pay this spell's mana cost."
Foul Spirit77%
$0.52↑#319700.0528.3 years↑
"When this creature enters, sacrifice a land."
Serendib Djinn76%
$151.56↑#283150.0032.8 years↑
"When you control no lands, sacrifice this creature."
Fireblast76%
$0.79↑#17545↑0.14↑29.7 years↑
"You may sacrifice two Mountains rather than pay this spell's mana cost."
Elder Spawn76%
$13.01↑#307370.25↑32.4 years↑
"At the beginning of your upkeep, unless you sacrifice an Island, sacrifice this creature and it deals 6 damage to you."
Plant Elemental76%
$0.33↑#317920.0029.5 years↑
"When this creature enters, sacrifice it unless you sacrifice a Forest."