Fallow Wurm 
Creature — Wurm
$0.25 #30761 0.00 29.4 years
When this creature enters, sacrifice it unless you discard a land card.
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Cards similar to Fallow Wurm expected a card that isn't here?
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Thundering Wurm100%
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"When this creature enters, sacrifice it unless you discard a land card."
Pack Guardian88%
$0.08↓#20282↑0.24↑10.5 years↓
"When this creature enters, you may discard a land card. If you do, create a 2/2 green Wolf creature token."
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$0.30↑#321600.0025.1 years↓
"Whenever this creature becomes the target of a spell or ability, sacrifice it unless you discard a land card."
Nantuko Cultivator82%
$0.18↓#14189↑0.0024.7 years↓
"When this creature enters, you may discard any number of land cards. Put that many +1/+1 counters on this creature and draw that many cards."
Magmatic Insight80%
$0.12↓#6309↑0.0611.3 years↓
"As an additional cost to cast this spell, discard a land card."
Ayula's Influence77%
$0.98↑#9270↑0.057.4 years↓
"Discard a land card: Create a 2/2 green Bear creature token."
Bloodrage Brawler74%
$0.21↓#19675↑0.009.5 years↓
"When this creature enters, discard a card."
Drekavac74%
$0.22↓#314080.0020.5 years↓
"When this creature enters, sacrifice it unless you discard a noncreature card."
Scorched Earth73%
$0.35↑#268941.38↑29.0 years
"As an additional cost to cast this spell, discard X land cards."
Rotting Regisaur70%
$2.08↑#5066↑0.27↑7.3 years↓
"At the beginning of your upkeep, discard a card."
Crosis's Catacombs70%
$0.28↑#9271↑0.0525.7 years↓
"When this land enters, sacrifice it unless you return a non-Lair land you control to its owner's hand."
Mox Diamond70%
$1117.50↑#247↑1.74↑28.6 years
"If this artifact would enter, you may discard a land card instead. If you do, put this artifact onto the battlefield. If you don't, put it into its owner's graveyard."