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
Rhox Faithmender 3WCreature — Rhino Monk Lifelink (Damage dealt by this creature also causes you to gain that much life.) If you would gain life, you gain twice that much life instead. 1/5
Prahv, Spires of Order Land {T}: Add {C}. {4}{W}{U}, {T}: Prevent all damage a source of your choice would deal this turn.
Discreet Retreat 3BEnchantment — Aura Enchant land Enchanted land has "{T}: Add two mana of any one color. Spend this mana only to cast outlaw spells or activate abilities of outlaw sources." (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.) Whenever you cast your first outlaw spell each turn, you draw a card and you lose 1 life.
Brinebound Gift Enchantment — Aura Enchant creature Whenever Brinebound Gift enters the battlefield or enchanted creature becomes the target of an Aura spell, create a 1/1 white Spirit creature token with flying. If Brinebound Gift would be put into a graveyard from anywhere, exile it instead.
Qarsi Deceiver 1UCreature — Naga Wizard {T}: Add {C}. Spend this mana only to cast a face-down creature spell, pay a mana cost to turn a manifested creature face up, or pay a morph cost. (A megamorph cost is a morph cost.) 0/4
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
Futurist Spellthief 2UCreature — Moonfolk Wizard Flash When Futurist Spellthief enters the battlefield, conjure a duplicate of target spell into your hand. That card perpetually gains "You may spend mana as though it were mana of any color to cast this spell." 3/2
Minimus Containment 2WEnchantment — Aura Enchant nonland permanent Enchanted permanent is a Treasure artifact with "{T}, Sacrifice this artifact: Add one mana of any color," and it loses all other abilities. (If it was a creature, it's no longer a creature.)
Snowfall 2UEnchantment Cumulative upkeep {U} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Whenever an Island is tapped for mana, its controller may add an additional {U}. If that Island is snow, its controller may add an additional {U}{U} instead. Spend this mana only to pay cumulative upkeep costs.
Wishful Merfolk 1UCreature — Merfolk Defender {1}{U}: Wishful Merfolk loses defender and becomes a Human until end of turn. 3/2
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