Gideon's Avenger 
Creature — Human Soldier
$0.69 #14609 0.38 15.3 years
Whenever a creature an opponent controls becomes tapped, put a +1/+1 counter on this creature.
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Cards similar to Gideon's Avenger expected a card that isn't here?
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Veteran of the Depths94%
$0.20↓#25344↓0.05↓19.0 years↑
"Whenever this creature becomes tapped, you may put a +1/+1 counter on it."
Rhoda, Geist Avenger90%
$0.37↓#10892↑0.17↓4.9 years↓
"Whenever a creature an opponent controls becomes tapped, if it isn't being declared as an attacker, put a +1/+1 counter on this card."
Tale of Katara and Toph86%
$2.03↑#5850↑0.20↓0.9 years↓
"Creatures you control have "Whenever this creature becomes tapped for the first time during each of your turns, put a +1/+1 counter on it.""
Freyalise's Winds84%
$0.59↓#25523↓1.29↑31.4 years↑
"Whenever a permanent becomes tapped, put a wind counter on it."
Palliation Accord82%
$0.37↓#19785↓0.00↓20.5 years↑
"Whenever a creature an opponent controls becomes tapped, put a palliation counter on this enchantment."
Zar Ojanen, Scion of Efrava82%
$0.17↓#18620↓0.00↓4.1 years↓
"Whenever this card becomes tapped, put a +1/+1 counter on each creature you control with toughness less than the number of basic land types among lands you control."
Betrayal80%
$0.29↓#137230.2829.7 years↑
"Whenever enchanted creature becomes tapped, you draw a card."
Orcish Mine78%
$0.20↓#30651↓0.06↓31.1 years↑
"At the beginning of your upkeep and whenever enchanted land becomes tapped, remove an ore counter from this Aura."
Insolence78%
$0.09↓#29529↓0.11↓25.7 years↑
"Whenever enchanted creature becomes tapped, this Aura deals 2 damage to that creature's controller."
Temporal Distortion78%
$0.38↓#26847↓1.24↑26.0 years↑
"Whenever a creature or land becomes tapped, put an hourglass counter on it."
Wanderbrine Preacher78%
$0.17↓#17799↓0.12↓0.7 years↓
"Whenever this creature becomes tapped, you gain 2 life."
Vampire Envoy77%
$0.12↓#19223↓0.00↓10.7 years↓
"Whenever this creature becomes tapped, you gain 1 life."
Solitary Sanctuary76%
$0.30↓#8508↑0.293.1 years↓
"Whenever you tap an untapped creature an opponent controls, put a +1/+1 counter on target creature you control."
Lifeblood76%
$20.64↑#30814↓0.27↓32.4 years↑
"Whenever a Mountain an opponent controls becomes tapped, you gain 1 life."
Thoughtleech76%
$0.22↓#25083↓0.3631.4 years↑
"Whenever an Island an opponent controls becomes tapped, you may gain 1 life."
Radha, Coalition Warlord76%
$0.08↓#19074↓0.06↓4.1 years↓
"Whenever this card becomes tapped, another target creature you control gets +X/+X until end of turn, where X is the number of basic land types among lands you control."
Verity Circle76%
$0.94↑#4339↑0.377.7 years↓
"Whenever a creature an opponent controls becomes tapped, if it isn't being declared as an attacker, you may draw a card."
Lust for War76%
$0.16↓#26025↓0.25↓16.5 years↑
"Whenever enchanted creature becomes tapped, this Aura deals 3 damage to that creature's controller."
Spirit Shackle76%
$0.24↓#30300↓0.09↓32.4 years↑
"Whenever enchanted creature becomes tapped, put a -0/-2 counter on it."
Agent Maria Hill76%
$0.14↓#23467↓0.14↓0.3 years↓
"Whenever this card becomes tapped to pay a teamwork cost, put a +1/+1 counter on her and draw a card."