Rush of Blood 

Instant
$0.30 #13580 0.20 14.3 years
Target creature gets +X/+0 until end of turn, where X is its power.
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Cards similar to Rush of Blood expected a card that isn't here?
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Onward // Victory95%
$0.19↓#21094↓0.299.4 years↓
"Target creature gets +X/+0 until end of turn, where X is its power."
Exponential Growth92%
$0.54↑#6675↑0.57↑5.4 years↓
"Until end of turn, double target creature's power X times."
Soul's Might90%
$0.09↓#141790.2017.9 years↑
"Put X +1/+1 counters on target creature, where X is that creature's power."
Nantuko Mentor90%
$0.36↑#23433↓0.2324.9 years↑
"
,
: Target creature gets +X/+X until end of turn, where X is that creature's power."
Auriok Bladewarden88%
$0.14↓#25109↓0.2722.9 years↑
"
: Target creature gets +X/+X until end of turn, where X is this creature's power."
Brambleguard Captain88%
$0.18↓#116990.192.1 years↓
"At the beginning of combat on your turn, target creature you control gets +X/+0 until end of turn, where X is this creature's power."
Legion Leadership // Legion Stronghold86%
$0.42↑#1207↑0.162.2 years↓
"Until end of turn, double target creature's power and it gains first strike."
Fatal Frenzy84%
$0.55↑#143200.36↑19.6 years↑
"Until end of turn, target creature you control gains trample and gets +X/+0, where X is its power. Sacrifice it at the beginning of the next end step."
Epic Fight84%
$0.37↑#114400.00↓0.2 years↓
"• Double target creature's power and toughness until end of turn."
Double Trouble82%
$2.01↑#135720.35↑0.9 years↓
"Double the power of each creature you control until end of turn."
Thickest in the Thicket82%
$0.50↑#2999↑0.222.1 years↓
"When this enchantment enters, put X +1/+1 counters on target creature, where X is that creature's power."
Choose Your Weapon80%
$0.24↓#10222↑0.06↓5.1 years↓
"• Two-Weapon Fighting — Double target creature's power and toughness until end of turn."
Roar of Endless Song80%
$0.26↓#132380.131.4 years↓
"Double the power and toughness of each creature you control until end of turn."
Dragonclaw Strike80%
$0.25↓#119790.121.4 years↓
"Double the power and toughness of target creature you control until end of turn. Then it fights up to one target creature an opponent controls."
Mr. Orfeo, the Boulder80%
$0.22↓#7784↑0.264.4 years↓
"Whenever you attack, double target creature's power until end of turn."