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
The Howling Abomination 3RGLegendary Creature — Human Beast Warrior Haste The Howling Abomination has trample as long as you've cast three or more spells this turn. Whenever The Howling Abomination becomes the target of a spell, it gets +2/+2 until end of turn and deals 2 damage to each opponent. 5/5
Brink of Disaster 2BBEnchantment — Aura Enchant creature or land When enchanted permanent becomes tapped, destroy it.
Straw Golem 1Artifact Creature — Golem When an opponent casts a creature spell, sacrifice Straw Golem. 2/3
Happy Dead Squirrel Stickers {TK}{TK} — {T}: Add {C}{C}. Spend this mana only to cast noncreature spells. {TK}{TK}{TK} — Infect (This permanent deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) {TK}{TK} — 3/2 {TK}{TK}{TK}{TK} — 4/7
Sarkhan the Masterless 3RRLegendary Planeswalker — Sarkhan Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature. [+1]: Until end of turn, each planeswalker you control becomes a 4/4 red Dragon creature and gains flying. [−3]: Create a 4/4 red Dragon creature token with flying. Loyalty 5
Sylvan Awakening 2GSorcery Until your next turn, all lands you control become 2/2 Elemental creatures with reach, indestructible, and haste. They're still lands.
Jund Plane — Alara Whenever a player casts a creature spell that's black, red, or green, it gains devour 5. (As the creature enters the battlefield, its controller may sacrifice any number of creatures. The creature enters the battlefield with five times that many +1/+1 counters on it.) Whenever chaos ensues, create two 1/1 red Goblin creature tokens.
Grid Monitor 4Artifact Creature — Construct You can't cast creature spells. 4/6
Glyph Keeper 3UUCreature — Sphinx Flying Whenever Glyph Keeper becomes the target of a spell or ability for the first time each turn, counter that spell or ability. Embalm {5}{U}{U} ({5}{U}{U}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Sphinx with no mana cost. Embalm only as a sorcery.) 5/3
Common Courtesy 2UUEnchantment Whenever a player casts a spell without asking your permission while casting it, counter that spell. When a player asks you permission to cast a spell and you refuse, counter that spell and sacrifice Common Courtesy.
Page 21