Combat Professor 

Creature — Bird Cleric
$0.08 #23845 0.27 5.4 years
Flying
At the beginning of combat on your turn, target creature you control gets +1/+0 and gains vigilance until end of turn.
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Cards similar to Combat Professor expected a card that isn't here?
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Might of the Ancestors99%
$0.09↑#192300.00↓2.8 years↓
"At the beginning of combat on your turn, target creature you control gets +2/+0 and gains vigilance until end of turn."
Surly Farrier94%
$0.08#206650.00↓0.6 years↓
"
: Target creature you control gets +1/+1 and gains vigilance until end of turn. Activate only as a sorcery."
Due Diligence90%
$0.09↑#17750↑0.272.6 years↓
"When this Aura enters, target creature you control other than enchanted creature gets +2/+2 and gains vigilance until end of turn."
Loxodon Sergeant90%
$0.14↑#256250.42↑7.3 years↑
"When this creature enters, other creatures you control gain vigilance until end of turn."
Sandstone Bridge88%
$0.13↑#12144↑0.15↓10.9 years↑
"When this land enters, target creature gets +1/+1 and gains vigilance until end of turn."
Additive Evolution88%
$0.18↑#15173↑0.00↓0.4 years↓
"At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. It gains vigilance until end of turn."
Adaptive Sporesinger88%
$0.19↑#11053↑0.04↓3.6 years↓
"• Target creature gets +2/+2 and gains vigilance until end of turn."
Angel of the Dawn88%
$0.18↑#16811↑0.17↓8.1 years↑
"When this creature enters, creatures you control get +1/+1 and gain vigilance until end of turn."
Dawnfeather Eagle88%
$0.15↑#246190.289.6 years↑
"When this creature enters, creatures you control get +1/+1 and gain vigilance until end of turn."
Wild Pack Squad86%
$0.11↑#17844↑0.17↓1.0 years↓
"At the beginning of combat on your turn, up to one target creature gains first strike and vigilance until end of turn."
Serra Paladin86%
$0.13↑#31152↓0.1830.9 years↑
"

,
: Target creature gains vigilance until end of turn."
Expanded Anatomy86%
$0.24↑#12855↑0.06↓5.4 years
"Put two +1/+1 counters on target creature. It gains vigilance until end of turn."
Treeguard Duo81%
$0.19↑#7716↑0.00↓2.1 years↓
"When this creature enters, until end of turn, target creature you control gains vigilance and gets +X/+X, where X is the number of creatures you control."
Homestead Courage81%
$0.17↑#16934↑0.42↑4.9 years
"Put a +1/+1 counter on target creature you control. It gains vigilance until end of turn."
Dig Site Inventory81%
$0.19↑#16882↑0.00↓0.4 years↓
"Put a +1/+1 counter on target creature you control. It gains vigilance until end of turn."