Mold Demon 
Creature — Fungus Demon
$17.95 #31643 0.11 32.4 years
When this creature enters, sacrifice it unless you sacrifice two Swamps.
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Cards similar to Mold Demon expected a card that isn't here?
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Scythe Tiger84%
$0.15↓#271280.00↓17.0 years↓
"When this creature enters, sacrifice it unless you sacrifice a land."
Foul Spirit84%
$0.52↓#319700.0528.3 years↓
"When this creature enters, sacrifice a land."
Plant Elemental82%
$0.33↓#317920.00↓29.5 years↓
"When this creature enters, sacrifice it unless you sacrifice a Forest."
Rogue Elephant82%
$0.19↓#303270.0529.4 years↓
"When this creature enters, sacrifice it unless you sacrifice a Forest."
Primeval Force82%
$0.22↓#307410.1229.5 years↓
"When this creature enters, sacrifice it unless you sacrifice three Forests."
Rathi Dragon82%
$0.40↓#313780.00↓29.0 years↓
"When this creature enters, sacrifice it unless you sacrifice two Mountains."
Everglades82%
$1.24↓#10492↑0.0329.7 years↓
"When this land enters, sacrifice it unless you return an untapped Swamp you control to its owner's hand."
Barbarian Outcast79%
$0.05↓#313880.00↓24.7 years↓
"When you control no Swamps, sacrifice this creature."
Lake of the Dead78%
$123.36↑#5294↑0.46↑30.4 years↓
"If this land would enter, sacrifice a Swamp instead. If you do, put this land onto the battlefield. If you don't, put it into its owner's graveyard."
Infernal Denizen78%
$0.91↓#276300.25↑31.4 years↓
"At the beginning of your upkeep, sacrifice two Swamps. If you can't, tap this creature, and an opponent may gain control of a creature you control of their choice for as long as this creature remains on the battlefield."
Mire Shade78%
$0.10↓#319730.00↓30.0 years↓
", Sacrifice a Swamp: Put a +1/+1 counter on this creature. Activate only as a sorcery."
, Sacrifice a Swamp: Put a +1/+1 counter on this creature. Activate only as a sorcery."
Coffin Puppets77%
$0.19↓#307790.00↓26.4 years↓
"Sacrifice two lands: Return this card from your graveyard to the battlefield. Activate only during your upkeep and only if you control a Swamp."
Mire Kavu76%
$0.06↓#312540.25↑25.7 years↓
"This creature gets +1/+1 as long as you control a Swamp."
Foreboding Ruins75%
$0.31↓#316↑0.0210.5 years↓
"As this land enters, you may reveal a Swamp or Mountain card from your hand. If you don't, this land enters tapped."
Blighted Shaman75%
$0.20↓#286860.00↓30.0 years↓
"
, Sacrifice a Swamp: Target creature gets +1/+1 until end of turn."
, Sacrifice a Swamp: Target creature gets +1/+1 until end of turn."
Dragonskull Summit74%
$0.46↓#82↑0.1517.3 years↓
"This land enters tapped unless you control a Swamp or a Mountain."
Cosmic Larva74%
$0.38↓#19799↑0.1222.4 years↓
"At the beginning of your upkeep, sacrifice this creature unless you sacrifice two lands."
Marsh Lurker74%
$0.09↓#321410.00↓29.0 years↓
"Sacrifice a Swamp: This creature gains fear until end of turn."
Akuta, Born of Ash74%
$0.39↓#24566↑0.00↓21.4 years↓
"At the beginning of your upkeep, if you have more cards in hand than each opponent, you may sacrifice a Swamp. If you do, return this card from your graveyard to the battlefield."
Necroblossom Snarl74%
$0.34↓#541↑0.065.5 years↓
"As this land enters, you may reveal a Swamp or Forest card from your hand. If you don't, this land enters tapped."