Card Codex

M:tG card similarity search

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
Decree of Silence 6UUEnchantment Whenever an opponent casts a spell, counter that spell and put a depletion counter on Decree of Silence. If there are three or more depletion counters on Decree of Silence, sacrifice it. Cycling {4}{U}{U} ({4}{U}{U}, Discard this card: Draw a card.) When you cycle Decree of Silence, you may counter target spell.
Woodcaller Automaton 10Artifact Creature — Construct Prototype {2}{G}{G} — 3/3 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) When Woodcaller Automaton enters the battlefield, if you cast it, untap target land you control. It becomes a Treefolk creature with haste and base power and toughness equal to Woodcaller Automaton's power and toughness. It's still a land. 8/8
Gandalf, Friend of the Shire 3ULegendary Creature — Avatar Wizard Flash You may cast sorcery spells as though they had flash. Whenever the Ring tempts you, if you chose a creature other than Gandalf, Friend of the Shire as your Ring-bearer, draw a card. 2/4
Torens, Fist of the Angels 1GWLegendary Creature — Human Cleric Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.) Whenever you cast a creature spell, create a 1/1 green and white Human Soldier creature token with training. 2/2
Quicksilver Dragon 4UUCreature — Dragon Flying {U}: If target spell has only one target and that target is Quicksilver Dragon, change that spell's target to another creature. Morph {4}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) 5/5
Vraska, Relic Seeker 4BGLegendary Planeswalker — Vraska [+2]: Create a 2/2 black Pirate creature token with menace. [−3]: Destroy target artifact, creature, or enchantment. Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") [−10]: Target player's life total becomes 1. Loyalty 6
Phantasmal Form 2UInstant Until end of turn, up to two target creatures each have base power and toughness 3/3, gain flying, and become blue Illusions in addition to their other colors and types. Draw a card.
Cryptoplasm 1UUCreature — Shapeshifter At the beginning of your upkeep, you may have Cryptoplasm become a copy of another target creature, except it has this ability. 2/2
Triton Cavalry 3UCreature — Merfolk Soldier Heroic — Whenever you cast a spell that targets Triton Cavalry, you may return target enchantment to its owner's hand. 2/4
Thundermaw Hellkite 3RRCreature — Dragon Flying Haste (This creature can attack and {T} as soon as it comes under your control.) When Thundermaw Hellkite enters the battlefield, it deals 1 damage to each creature with flying your opponents control. Tap those creatures. 5/5
Page 146