Formation Breaker 

Creature — Beast
$0.16 #21350 0.33 1.5 years
Creatures with power less than this creature's power can't block it.
As long as you control a creature with a counter on it, this creature gets +1/+2.
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Cards similar to Formation Breaker expected a card that isn't here?
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Wandering Wolf97%
$0.10↓#194130.06↓14.5 years↑
"Creatures with power less than this creature's power can't block it."
Skarrgan Pit-Skulk96%
$0.06↓#26727↓0.07↓20.7 years↑
"Creatures with power less than this creature's power can't block it."
Battering Wurm96%
$0.11↓#26162↓0.19↓20.7 years↑
"Creatures with power less than this creature's power can't block it."
Howlgeist94%
$0.08↓#229460.06↓14.5 years↑
"Creatures with power less than this creature's power can't block it."
Shrill Howler // Howling Chorus94%
$0.11↓#215440.17↓10.2 years↑
"Creatures with power less than this creature's power can't block it."
Elusive Otter // Grove's Bounty92%
$0.27↑#7062↑0.00↓3.1 years↑
"Creatures with power less than this creature's power can't block it."
Feasting Hobbit90%
$0.58↑#3997↑0.273.3 years↑
"Creatures with power less than this creature's power can't block it."
Den Protector90%
$0.15↓#6765↑0.06↓11.6 years↑
"Creatures with power less than this creature's power can't block it."
Aura Gnarlid90%
$0.12↓#11378↑0.56↑16.5 years↑
"Creatures with power less than this creature's power can't block it."
Champion of Lambholt88%
$2.83↑#584↑0.58↑14.5 years↑
"Whenever another creature you control enters, put a +1/+1 counter on this creature."
+1 more matching line
Radha's Firebrand87%
$0.04↓#218680.334.1 years↑
"Whenever this creature attacks, target creature defending player controls with power less than this creature's power can't block this turn."
Spitfire Handler73%
$0.19↑#31016↓0.10↓24.0 years↑
"This creature can't block creatures with power greater than this creature's power."
Earthshaker Khenra71%
$0.20↑#231240.00↓9.3 years↑
"When this creature enters, target creature with power less than or equal to this creature's power can't block this turn."
Conclave Mentor70%
$0.34↑#2383↑0.20↓6.3 years↑
"If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on that creature instead."
Elenda's Hierophant70%
$3.50↑#1838↑0.22↓2.9 years↑
"Whenever you gain life, put a +1/+1 counter on this creature."