Lithophage 
Creature — Insect
$0.32 #31102 0.07 26.9 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%
$0.36↑#19553↑0.29↑22.3 years↓
"At the beginning of your upkeep, sacrifice this creature unless you sacrifice two lands."
Rathi Dragon92%
$0.38↑#310330.1128.9 years↑
"When this creature enters, sacrifice it unless you sacrifice two Mountains."
Bog Elemental90%
$0.25↓#303540.0026.3 years
"At the beginning of your upkeep, sacrifice this creature unless you sacrifice a land."
Polar Kraken88%
$3.78↑#256320.20↑31.3 years↑
"Cumulative upkeep—Sacrifice a land."
Territorial Dispute87%
$0.42↑#288431.39↑26.9 years
"At the beginning of your upkeep, sacrifice this enchantment unless you sacrifice a land."
Scythe Tiger82%
$0.13↓#267070.25↑16.9 years↓
"When this creature enters, sacrifice it unless you sacrifice a land."
Mogg Alarm80%
$0.23↓#18908↑0.0026.6 years
"You may sacrifice two Mountains rather than pay this spell's mana cost."
The Gitrog Monster79%
$0.51↑#904↑0.88↑10.4 years↓
"At the beginning of your upkeep, sacrifice this card unless you sacrifice a land."
Psychic Allergy79%
$3.37↑#281580.43↑32.1 years↑
"At the beginning of your upkeep, destroy this enchantment unless you sacrifice two Islands."
Thunderclap78%
$0.19↓#15788↑0.29↑26.9 years
"You may sacrifice a Mountain rather than pay this spell's mana cost."
Wand of the Elements78%
$0.25↓#303640.24↑22.6 years↓
"
, Sacrifice a Mountain: Create a 3/3 red Elemental creature token."
, Sacrifice a Mountain: Create a 3/3 red Elemental creature token."
Mine Collapse78%
$0.16↓#13156↑0.32↑5.2 years↓
"If it's your turn, you may sacrifice a Mountain rather than pay this spell's mana cost."
Crash78%
$0.22↓#24063↑0.75↑26.9 years
"You may sacrifice a Mountain rather than pay this spell's mana cost."
Pulverize78%
$1.22↑#256940.39↑26.9 years
"You may sacrifice two Mountains rather than pay this spell's mana cost."
Downhill Charge78%
$0.26↓#12174↑0.0626.6 years
"You may sacrifice a Mountain rather than pay this spell's mana cost."
Fireblast77%
$0.63↑#17291↑0.57↑29.6 years↑
"You may sacrifice two Mountains rather than pay this spell's mana cost."
Serendib Djinn76%
$151.56↑#280230.44↑32.7 years↑
"When you control no lands, sacrifice this creature."
Elder Spawn76%
$13.10↑#304130.0032.3 years↑
"At the beginning of your upkeep, unless you sacrifice an Island, sacrifice this creature and it deals 6 damage to you."
Plant Elemental76%
$0.22↓#314510.0029.3 years↑
"When this creature enters, sacrifice it unless you sacrifice a Forest."
Rogue Elephant76%
$0.18↓#300370.24↑29.2 years↑
"When this creature enters, sacrifice it unless you sacrifice a Forest."