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
Pentagram of the Ages 4Artifact {4}, {T}: The next time a source of your choice would deal damage to you this turn, prevent that damage.
Singing Towers of Darillium Plane — Darillium Each nonland card in your hand without foretell has foretell. Its foretell cost is equal to its mana cost reduced by {2}. (During your turn, you may pay {2} and exile it from your hand face down. Cast it on a later turn for its foretell cost.) Whenever chaos ensues, you may cast a foretold card you own from exile without paying its mana cost this turn.
Soltari Guerrillas 2RWCreature — Soltari Soldier Shadow (This creature can block or be blocked by only creatures with shadow.) {0}: The next time Soltari Guerrillas would deal combat damage to an opponent this turn, it deals that damage to target creature instead. 3/2
Invulnerability 1WInstant Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.) The next time a source of your choice would deal damage to you this turn, prevent that damage.
Don't Blink 1UInstant Until end of turn, if one or more creatures would enter the battlefield from exile or after being cast from exile, their owners shuffle them into their libraries instead. Cycling {2} ({2}, Discard this card: Draw a card.)
Elspeth's Smite WInstant Elspeth's Smite deals 3 damage to target attacking or blocking creature. If that creature would die this turn, exile it instead.
Heartlash Cinder 1RCreature — Elemental Warrior Haste Chroma — When Heartlash Cinder enters the battlefield, it gets +X/+0 until end of turn, where X is the number of red mana symbols in the mana costs of permanents you control. 1/1
Harold and Bob, First Numens 2GLegendary Creature — Treefolk Mutant Vigilance, reach When Harold and Bob, First Numens dies, if it was a creature, return it to the battlefield. It's an Aura enchantment with enchant Forest you control and "Enchanted Forest has '{T}: Add three mana of any one color. You get two rad counters.'" Harold and Bob loses all other abilities. 3/3
Kurgadon 4GCreature — Beast Whenever you cast a creature spell with mana value 6 or greater, put three +1/+1 counters on Kurgadon. 3/3
Citystalker Connoisseur 3BCreature — Vampire Deathtouch When Citystalker Connoisseur enters the battlefield, target opponent discards a nonland card with the greatest mana value among cards in their hand. Create a Blood token. 3/3
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