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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
Princess Luna Legendary Creature — Alicorn Flying When this creature transforms into Princess Luna, choose up to six cards you own from outside the game with a moon in their art, then exile those cards. As long as those cards remain exiled, you may cast them, and your friends may cast them with your permission. (Gifts are appreciated.) 4/4
Deepfathom Echo 2GUCreature — Merfolk Spirit At the beginning of combat on your turn, Deepfathom Echo explores. Then you may have it become a copy of another creature you control until end of turn. (To have this creature explore, reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.) 4/4
Marchesa's Decree 3BEnchantment When Marchesa's Decree enters the battlefield, you become the monarch. Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life.
Permeating Mass GCreature — Spirit Whenever Permeating Mass deals combat damage to a creature, that creature becomes a copy of Permeating Mass. 1/3
Sungrace Pegasus 1WCreature — Pegasus Flying (This creature can't be blocked except by creatures with flying or reach.) Lifelink (Damage dealt by this creature also causes you to gain that much life.) 1/2
Frogify 1UEnchantment — Aura Enchant creature Enchanted creature loses all abilities and is a blue Frog creature with base power and toughness 1/1. (It loses all other card types and creature types.)
Mirrored Depths Plane — Karsus Whenever a player casts a spell, that player flips a coin. If the player loses the flip, counter that spell. Whenever chaos ensues, target player reveals the top card of their library. If it's a nonland card, you may cast it without paying its mana cost.
River's Grasp 3U/BSorcery If {U} was spent to cast this spell, return up to one target creature to its owner's hand. If {B} was spent to cast this spell, target player reveals their hand, you choose a nonland card from it, then that player discards that card. (Do both if {U}{B} was spent.)
Face of Divinity 2WEnchantment — Aura Enchant creature Enchanted creature gets +2/+2. As long as another Aura is attached to enchanted creature, it has first strike and lifelink.
Snakeform 2G/UInstant Until end of turn, target creature loses all abilities and becomes a green Snake with base power and toughness 1/1. Draw a card.
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