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17 May 2024: Card library updated.

Opal Guardian

WWW · Enchantment

When an opponent casts a creature spell, if Opal Guardian is an enchantment, Opal Guardian becomes a 3/4 Gargoyle creature with flying and protection from red.

Similar cards

Color identity:
NameManaTypeText
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Wash Away UInstant Cleave {1}{U}{U} (You may cast this spell for its cleave cost. If you do, remove the words in square brackets.) Counter target spell [that wasn't cast from its owner's hand].
Seed Spark 3WInstant Destroy target artifact or enchantment. If {G} was spent to cast this spell, create two 1/1 green Saproling creature tokens.
Singe RInstant Singe deals 1 damage to target creature. That creature becomes black until end of turn.
Mistral Singer 2UCreature — Siren Flying Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) 2/2
Mimic 2Artifact — Treasure {T}, Sacrifice Mimic: Add one mana of any color. {2}: Mimic becomes a Shapeshifter artifact creature with base power and toughness 3/3 until end of turn.
Cyclopean Giant 2BBCreature — Zombie Giant When Cyclopean Giant dies, target land becomes a Swamp. Exile Cyclopean Giant. 4/2
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