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
Caged Sun 6Artifact As Caged Sun enters the battlefield, choose a color. Creatures you control of the chosen color get +1/+1. Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.
Leafkin Druid 1GCreature — Elemental Druid {T}: Add {G}. If you control four or more creatures, add {G}{G} instead. 0/3
Star Compass 2Artifact Star Compass enters the battlefield tapped. {T}: Add one mana of any color that a basic land you control could produce.
Urza's Mine Land — Urza's Mine {T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.
Rune of Protection: Green 1WEnchantment {W}: The next time a green source of your choice would deal damage to you this turn, prevent that damage. Cycling {2} ({2}, Discard this card: Draw a card.)
Frodo, Sauron's Bane WLegendary Creature — Halfling Citizen {W/B}{W/B}: If Frodo, Sauron's Bane is a Citizen, it becomes a Halfling Scout with base power and toughness 2/3 and lifelink. {B}{B}{B}: If Frodo is a Scout, it becomes a Halfling Rogue with "Whenever this creature deals combat damage to a player, that player loses the game if the Ring has tempted you four or more times this game. Otherwise, the Ring tempts you." 1/2
Goblin Artisans RCreature — Goblin Artificer {T}: Flip a coin. If you win the flip, draw a card. If you lose the flip, counter target artifact spell you control that isn't the target of an ability from another creature named Goblin Artisans. 1/1
Master of Dark Rites BCreature — Vampire Cleric {T}, Sacrifice another creature: Add {B}{B}{B}. Spend this mana only to cast Vampire, Cleric, and/or Demon spells. 1/1
Bucolic Ranch Land — Desert {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a Mount spell. {3}, {T}: Look at the top card of your library. If it's a Mount card, you may reveal it and put it into your hand. If you don't put it into your hand, you may put it on the bottom of your library.
Fickle Efreet 3RCreature — Efreet Whenever Fickle Efreet attacks or blocks, flip a coin at end of combat. If you lose the flip, an opponent gains control of Fickle Efreet. 5/2
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