Card Codex

M:tG card similarity search

17 May 2024: Card library updated.

Horizon Stone

5 · Artifact

If you would lose unspent mana, that mana becomes colorless instead.

Similar cards

Color identity:
NameManaTypeText
Sphere of Law 3WEnchantment If a red source would deal damage to you, prevent 2 of that damage.
Pariah's Shield 5Artifact — Equipment All damage that would be dealt to you is dealt to equipped creature instead. Equip {3}
Reverse Damage 1WWInstant The next time a source of your choice would deal damage to you this turn, prevent that damage. You gain life equal to the damage prevented this way.
Fiendish Duo 4RRCreature — Devil First strike If a source would deal damage to an opponent, it deals double that damage to that player instead. 5/5
March of the Machines 3UEnchantment Each noncreature artifact is an artifact creature with power and toughness each equal to its mana value. (Equipment that's a creature can't equip a creature.)
Tome of the Guildpact 5Artifact Whenever you cast a multicolored spell, draw a card. {T}: Add one mana of any color.
Brimstone Vandal 2RCreature — Devil Menace (This creature can't be blocked except by two or more creatures.) If it's neither day nor night, it becomes day as Brimstone Vandal enters the battlefield. Whenever day becomes night or night becomes day, Brimstone Vandal deals 1 damage to each opponent. 2/3
Circle of Protection: Shadow 1WEnchantment {1}: The next time a creature of your choice with shadow would deal damage to you this turn, prevent that damage.
Ensnared by the Mara 2RRSorcery Each opponent faces a villainous choice — They exile cards from the top of their library until they exile a nonland card, then you may cast that card without paying its mana cost, or that player exiles the top four cards of their library and Ensnared by the Mara deals damage equal to the total mana value of those exiled cards to that player.
Dark Confidant 1BCreature — Human Wizard At the beginning of your upkeep, reveal the top card of your library and put that card into your hand. You lose life equal to its mana value. 2/1
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