Mortal Obstinacy {W}
Enchantment — Aura
Enchant creature you control
Enchanted creature gets +1/+1.
Whenever enchanted creature deals combat damage to a player, you may sacrifice this Aura. If you do, destroy target enchantment.
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Cards that do something similar expected a card that isn't here?
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Flamespeaker's Will 83%
$0.16#19740
"Whenever enchanted creature deals combat damage to a player, you may sacrifice this Aura. If you do, destroy target artifact."
+1 more matching line
Sleep Magic 81%
$0.15#14387
"When enchanted creature is dealt damage, sacrifice this Aura."
+1 more matching line