Dog Umbra 

Enchantment — Aura
Flash
Enchant creature
As long as another player controls enchanted creature, it can't attack or block. Otherwise, this Aura has umbra armor. (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)
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Cowed by Wisdom 85%
$0.18#22095
"Enchanted creature can't attack or block unless its controller pays {1} for each card in your hand."
+1 more matching line
Fog on the Barrow-Downs 85%
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"Enchanted creature is a Spirit and can't attack or block."
+1 more matching line
Wirecat 82%
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"Enchanted creature can't attack or block unless its controller pays {3}."
+1 more matching line
Choking Restraints 81%
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"Enchanted creature can't attack or block."
+1 more matching line