Riot Control 
Instant
$0.29 #2308 0.35 13.3 years
You gain 1 life for each creature your opponents control. Prevent all damage that would be dealt to you this turn.
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Fog of War87%
$0.13↓#14237↓0.313.8 years↓
"You gain 1 life for each creature on the battlefield. Prevent all combat damage that would be dealt this turn by creatures with power 3 or less."
Blunt the Assault84%
$0.20↓#12821↓0.07↓15.9 years↑
"You gain 1 life for each creature on the battlefield. Prevent all combat damage that would be dealt this turn."
Safe Passage82%
$0.11↓#10820↓0.60↑17.1 years↑
"Prevent all damage that would be dealt to you and creatures you control this turn."
Hallow78%
$0.48↑#17220↓0.12↓22.6 years↑
"Prevent all damage target spell would deal this turn. You gain life equal to the damage prevented this way."
Inkshield78%
$5.58↑#795↑0.73↑5.4 years↓
"Prevent all combat damage that would be dealt to you this turn. For each 1 damage prevented this way, create a 2/1 white and black Inkling creature token with flying."
Reverse Damage78%
$0.41↑#18864↓0.45↑33.1 years↑
"The next time a source of your choice would deal damage to you this turn, prevent that damage. You gain life equal to the damage prevented this way."
Eerie Interference78%
$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."
Thwart the Enemy75%
$0.15↓#14375↓0.10↓6.4 years↓
"Prevent all damage that would be dealt this turn by creatures your opponents control."
Divine Light74%
$0.13↓#23492↓0.12↓25.3 years↑
"Prevent all damage that would be dealt this turn to creatures you control."
Forfend74%
$0.20↓#25017↓0.4418.6 years↑
"Prevent all damage that would be dealt to creatures this turn."
Match the Odds74%
$0.19↓#12015↓0.00↓0.8 years↓
"Create a 1/1 white Ally creature token. Put a +1/+1 counter on it for each creature your opponents control."
Endure73%
$0.18↓#27090↓0.3318.1 years↑
"Prevent all damage that would be dealt to you and permanents you control this turn."
Divine Congregation72%
$0.22↓#22989↓0.05↓19.9 years↑
"You gain 2 life for each creature target player controls."
Blessed Reversal72%
$0.26↓#18508↓0.3429.3 years↑
"You gain 3 life for each creature attacking you."
Chameleon Blur72%
$0.18↓#26137↓0.47↑19.9 years↑
"Prevent all damage that creatures would deal to players this turn."
Terrifying Presence72%
$0.24↓#11824↓0.2614.3 years
"Prevent all combat damage that would be dealt by creatures other than target creature this turn."
Heavy Fog72%
$27.75↑#24500↓0.00↓27.3 years↑
"Prevent all damage that would be dealt to you this turn by attacking creatures."
Deep Wood72%
$0.23↓#24658↓0.22↓29.3 years↑
"Prevent all damage that would be dealt to you this turn by attacking creatures."
Scourge of Geier Reach72%
$0.08↓#24812↓0.07↓14.9 years↑
"This creature gets +1/+1 for each creature your opponents control."
Obscuring Haze71%
$4.85↑#1503↑0.84↑6.4 years↓
"Prevent all damage that would be dealt this turn by creatures your opponents control."