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
Aegis of Honor WEnchantment {1}: The next time an instant or sorcery spell would deal damage to you this turn, that spell deals that damage to its controller instead.
Clockwork Servant 3Artifact Creature — Gnome Adamant — When Clockwork Servant enters the battlefield, if at least three mana of the same color was spent to cast it, draw a card. 2/3
Poison Dart Frog 1GCreature — Frog Reach {T}: Add one mana of any color. {2}: Poison Dart Frog gains deathtouch until end of turn. 1/1
Rem Karolus, Stalwart Slayer 1RWLegendary Creature — Human Knight Flying, haste If a spell would deal damage to you or another permanent you control, prevent that damage. If a spell would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 1 instead. 2/3
Pyromancer's Swath 2REnchantment If an instant or sorcery source you control would deal damage to a permanent or player, it deals that much damage plus 2 to that permanent or player instead. At the beginning of each end step, discard your hand.
Eldrazi Temple Land {T}: Add {C}. {T}: Add {C}{C}. Spend this mana only to cast colorless Eldrazi spells or activate abilities of colorless Eldrazi.
Malicious Malfunction 1BBSorcery All creatures get -2/-2 until end of turn. If a creature would die this turn, exile it instead.
Gather Specimens 3UUUInstant If a creature would enter the battlefield under an opponent's control this turn, it enters the battlefield under your control instead.
Arcane Proxy 7Artifact Creature — Wizard Prototype {1}{U}{U} — 2/1 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) When Arcane Proxy enters the battlefield, if you cast it, exile target instant or sorcery card with mana value less than or equal to Arcane Proxy's power from your graveyard. Copy that card. You may cast the copy without paying its mana cost. 4/3
Snag 3GInstant You may discard a Forest card rather than pay this spell's mana cost. Prevent all combat damage that would be dealt by unblocked creatures this turn.
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