Energy Flux 
Enchantment
$0.27 #15121 1.53 32.6 years
All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay ."
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Cards similar to Energy Flux expected a card that isn't here?
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Kataki, War's Wage98%
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"All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay 
.""
.""
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"All creatures have "At the beginning of your upkeep, sacrifice this creature unless you pay .""
.""
Magus of the Tabernacle88%
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"All creatures have "At the beginning of your upkeep, sacrifice this creature unless you pay .""
.""
Disruption Aura88%
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"Enchanted artifact has "At the beginning of your upkeep, sacrifice this artifact unless you pay its mana cost.""
Aether Barrier82%
$6.20↑#145471.24↓26.7 years↓
"Whenever a player casts a creature spell, that player sacrifices a permanent of their choice unless they pay ."
."
The Tabernacle at Pendrell Vale80%
$3239.00↑#8859↑2.83↑32.4 years
"All creatures have "At the beginning of your upkeep, destroy this creature unless you pay .""
.""
Aura Flux80%
$0.24↓#24741↓1.12↓27.7 years↓
"Other enchantments have "At the beginning of your upkeep, sacrifice this enchantment unless you pay .""
.""
Vile Consumption80%
$10.46↑#136431.14↓26.0 years↓
"All creatures have "At the beginning of your upkeep, sacrifice this creature unless you pay 1 life.""
Fade Away80%
$0.26↓#134521.20↓28.3 years↓
"For each creature, its controller sacrifices a permanent of their choice unless they pay ."
."
Rishadan Footpad74%
$0.32↑#19984↓0.35↓27.0 years↓
"When this creature enters, each opponent sacrifices a permanent of their choice unless they pay ."
."
Rishadan Cutpurse74%
$0.14↓#19244↓0.12↓27.0 years↓
"When this creature enters, each opponent sacrifices a permanent of their choice unless they pay ."
."
Spelltithe Enforcer74%
$6.68↑#8731↑1.33↓20.7 years↓
"Whenever an opponent casts a spell, that player sacrifices a permanent of their choice unless they pay ."
."
Pendrell Flux73%
$0.12↓#27248↓0.47↓28.0 years↓
"Enchanted creature has "At the beginning of your upkeep, sacrifice this creature unless you pay its mana cost.""
Soul Tithe73%
$0.18↓#18653↓0.64↓14.0 years↓
"At the beginning of the upkeep of enchanted permanent's controller, that player sacrifices it unless they pay 
, where X is its mana value."
, where X is its mana value."
Slow Motion70%
$0.19↓#24000↓0.22↓27.7 years↓
"At the beginning of the upkeep of enchanted creature's controller, that player sacrifices that creature unless they pay ."
."
Rishadan Brigand70%
$0.47↑#21927↓0.47↓27.0 years↓
"When this creature enters, each opponent sacrifices a permanent of their choice unless they pay 
."
."