Sivvi's Ruse 
Instant
$0.17 #26678 0.12 26.6 years
If an opponent controls a Mountain and you control a Plains, you may cast this spell without paying its mana cost.
Prevent all damage that would be dealt this turn to creatures you control.
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Cards similar to Sivvi's Ruse expected a card that isn't here?
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Light of Sanction86%
$0.42↑#233930.47↑20.9 years↓
"Prevent all damage that would be dealt to creatures you control by sources you control."
Mark of Asylum86%
$1.82↑#16626↑0.0617.6 years↓
"Prevent all noncombat damage that would be dealt to creatures you control."
Bubble Matrix85%
$11.59↑#18936↑0.89↑29.2 years↑
"Prevent all damage that would be dealt to creatures."
Saprazzan Legate83%
$0.39↑#20575↑0.00↓26.9 years
"If an opponent controls a Mountain and you control an Island, you may cast this spell without paying its mana cost."
Shielded Passage82%
$0.04↓#21108↑0.36↑13.6 years↓
"Prevent all damage that would be dealt to target creature this turn."
Divine Light81%
$0.13↓#234920.1225.3 years↓
"Prevent all damage that would be dealt this turn to creatures you control."
Inner Sanctum81%
$1.02↑#236150.67↑29.2 years↑
"Prevent all damage that would be dealt to creatures you control."
Crystal Fragments // Summon: Alexander80%
$0.22↑#7501↑0.141.2 years↓
"Prevent all damage that would be dealt to creatures you control this turn."
Safe Passage78%
$0.11↓#10820↑0.60↑17.1 years↓
"Prevent all damage that would be dealt to you and creatures you control this turn."
Orim's Cure78%
$0.16↓#296590.00↓26.9 years
"Prevent the next 4 damage that would be dealt to any target this turn."
+1 more matching line
Statecraft78%
$4.07↑#14147↑0.54↑26.9 years
"Prevent all combat damage that would be dealt to and dealt by creatures you control."
Redeem78%
$0.08↓#290980.1927.9 years↑
"Prevent all damage that would be dealt this turn to up to two target creatures."
Goblin Furrier78%
$0.09↓#314180.29↑20.1 years↓
"Prevent all damage that this creature would deal to snow creatures."
Inviolability78%
$0.20↑#19366↑0.1626.9 years
"Prevent all damage that would be dealt to enchanted creature."
Forfend77%
$0.20↑#250170.44↑18.6 years↓
"Prevent all damage that would be dealt to creatures this turn."
Blessed Sanctuary76%
$4.21↑#5916↑0.42↑6.1 years↓
"Prevent all noncombat damage that would be dealt to you and creatures you control."
Tajic, Legion's Edge76%
$0.31↑#7898↑0.30↑7.9 years↓
"Prevent all noncombat damage that would be dealt to other creatures you control."
Eerie Interference76%
$0.27↑#9212↑0.00↓3.0 years↓
"Prevent all damage that would be dealt to you and creatures you control this turn by creatures."
Crystal Barricade76%
$2.27↑#2039↑0.39↑1.8 years↓
"Prevent all noncombat damage that would be dealt to other creatures you control."
Indestructible Aura76%
$0.28↑#237300.33↑32.3 years↑
"Prevent all damage that would be dealt to target creature this turn."