Mirrored Image

Enchant Creature
When this enchantment enters the battlefield, it gains 3 mirror counters.
When the enchanted creature is dealt damage, roll a d20. If there are 3 mirror counters and you roll a 6 or higher, remove 1 mirror counter and the enchanted creature takes no damage. If there are 2 mirror counters and you roll an 8 or higher, do likewise. If there is 1 mirror counter and you roll an 11 or higher, do likewise and destroy the enchantment.