Jokulmorder 



Creature — Leviathan
$0.60 #24405 0.05 20.2 years
Trample
This creature enters tapped.
When this creature enters, sacrifice it unless you sacrifice five lands.
This creature doesn't untap during your untap step.
Whenever you play an Island, you may untap this creature.
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Cards similar to Jokulmorder expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
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"This creature doesn't untap during your untap step."
+1 more matching line
Dwarven Patrol90%
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"This creature doesn't untap during your untap step."
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"this card doesn't untap during your untap step."
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Nettle Sentinel88%
$0.27↓#18813↑0.1318.2 years↓
"This creature doesn't untap during your untap step."
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Black Carriage88%
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"This creature doesn't untap during your untap step."
Deep-Slumber Titan87%
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"This creature doesn't untap during your untap step."
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Slumbering Cerberus87%
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"This creature doesn't untap during your untap step."
Soldevi Golem86%
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"This creature doesn't untap during your untap step."
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Sunstrike Legionnaire86%
$1.18↑#17695↑0.1223.7 years↑
"This creature doesn't untap during your untap step."
+1 more matching line
Galvanic Juggernaut86%
$0.07↓#248950.0615.1 years↓
"This creature doesn't untap during your untap step."
Phyrexian Colossus84%
$0.19↓#226480.0528.0 years↑
"This creature doesn't untap during your untap step."
Goblin Sharpshooter84%
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"This creature doesn't untap during your untap step."
Battered Golem82%
$0.38↓#8904↑0.33↑22.4 years↑
"This creature doesn't untap during your untap step."
Farmstead Gleaner82%
$0.21↓#12511↑0.067.4 years↓
"This creature doesn't untap during your untap step."
Leviathan82%
$0.30↓#257600.0032.2 years↑
"At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap this creature."
+1 more matching line
Altar Golem82%
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"This creature doesn't untap during your untap step."
+1 more matching line
Scythe Tiger80%
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"When this creature enters, sacrifice it unless you sacrifice a land."