Mold Demon 
Creature — Fungus Demon
$17.78 #31370 0.00 32.3 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 Tiger82%
$0.13↓#267070.25↑16.9 years↓
"When this creature enters, sacrifice it unless you sacrifice a land."
Foul Spirit82%
$0.61↓#316250.0628.2 years↓
"When this creature enters, sacrifice a land."
Lake of the Dead80%
$122.08↑#5329↑0.59↑30.2 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."
Mire Shade80%
$0.10↓#316370.21↑29.9 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 Puppets79%
$0.16↓#305320.30↑26.3 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."
Barbarian Outcast78%
$0.09↓#310130.53↑24.6 years↓
"When you control no Swamps, sacrifice this creature."
Rathi Dragon78%
$0.38↓#310330.11↑28.9 years↓
"When this creature enters, sacrifice it unless you sacrifice two Mountains."
Plant Elemental78%
$0.22↓#314510.0029.3 years↓
"When this creature enters, sacrifice it unless you sacrifice a Forest."
Rogue Elephant78%
$0.18↓#300370.24↑29.2 years↓
"When this creature enters, sacrifice it unless you sacrifice a Forest."
Primeval Force78%
$0.23↓#304580.62↑29.3 years↓
"When this creature enters, sacrifice it unless you sacrifice three Forests."
Everglades78%
$1.21↓#10396↑0.13↑29.6 years↓
"When this land enters, sacrifice it unless you return an untapped Swamp you control to its owner's hand."
Infernal Denizen77%
$0.88↓#273390.29↑31.3 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 Kavu76%
$0.06↓#309570.10↑25.6 years↓
"This creature gets +1/+1 as long as you control a Swamp."
Foreboding Ruins76%
$0.27↓#319↑0.0410.4 years↓
"As this land enters, you may reveal a Swamp or Mountain card from your hand. If you don't, this land enters tapped."
Akuta, Born of Ash76%
$0.37↓#24169↑0.15↑21.3 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."
Blighted Shaman76%
$0.19↓#283880.47↑29.9 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 Summit76%
$0.43↓#84↑0.19↑17.1 years↓
"This land enters tapped unless you control a Swamp or a Mountain."
Marsh Lurker76%
$0.10↓#318820.10↑28.9 years↓
"Sacrifice a Swamp: This creature gains fear until end of turn."
Necroblossom Snarl75%
$0.35↓#526↑0.14↑5.4 years↓
"As this land enters, you may reveal a Swamp or Forest card from your hand. If you don't, this land enters tapped."
Woodland Cemetery74%
$0.63↓#111↑0.0514.9 years↓
"This land enters tapped unless you control a Swamp or a Forest."