Demand Answers 
Instant
$0.45 #414 0.10 2.6 years
As an additional cost to cast this spell, sacrifice an artifact or discard a card.
Draw two cards.
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$0.27↓#9410↓0.00↓0.2 years↓
"You may sacrifice an artifact or discard a card. If you do, draw two cards."
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$0.26↓#3399↓0.178.9 years↑
"As an additional cost to cast this spell, sacrifice an artifact or creature."
+1 more matching line
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"As an additional cost to cast this spell, discard a card."
+1 more matching line
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"As an additional cost to cast this spell, discard a card."
+1 more matching line
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"As an additional cost to cast this spell, discard a card."
+1 more matching line
Deadly Dispute83%
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"As an additional cost to cast this spell, sacrifice an artifact or creature."
+1 more matching line
K'un-Lun Warrior82%
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"When this creature enters, you may sacrifice an artifact or discard a card. If you do, draw a card."
Reckoner's Bargain82%
$0.95↑#3767↓0.154.5 years↑
"As an additional cost to cast this spell, sacrifice an artifact or creature."
Morbid Curiosity81%
$0.18↓#8296↓0.33↑9.9 years↑
"As an additional cost to cast this spell, sacrifice an artifact or creature."
Kuldotha Rebirth80%
$0.25↓#13389↓0.23↑15.9 years↑
"As an additional cost to cast this spell, sacrifice an artifact."
Eviscerator's Insight80%
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"As an additional cost to cast this spell, sacrifice an artifact or creature."
+1 more matching line
Quarrel's End80%
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"As an additional cost to cast this spell, discard a card."
+1 more matching line
Fanatical Offering80%
$2.11↑#4480↓0.092.8 years
"As an additional cost to cast this spell, sacrifice an artifact or creature."
Splitting the Powerstone78%
$0.10↓#21592↓0.27↑3.8 years↑
"As an additional cost to cast this spell, sacrifice an artifact."
Electric Revelation76%
$0.13↓#5446↓0.174.9 years↑
"As an additional cost to cast this spell, discard a card."
+1 more matching line
Laughing Mad76%
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"As an additional cost to cast this spell, discard a card."
+1 more matching line
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"As an additional cost to cast this spell, discard a card."
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"As an additional cost to cast this spell, discard a card."
Incendiary Sabotage74%
$0.05↓#27174↓0.27↑9.9 years↑
"As an additional cost to cast this spell, sacrifice an artifact."
Powerstone Fracture74%
$0.09↓#18951↓0.00↓3.8 years↑
"As an additional cost to cast this spell, sacrifice an artifact or creature."