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
Shining Shoal XWWInstant — Arcane You may exile a white card with mana value X from your hand rather than pay this spell's mana cost. The next X damage that a source of your choice would deal to you and/or creatures you control this turn is dealt to any target instead.
Harvest Mage GCreature — Human Spellshaper {G}, {T}, Discard a card: Until end of turn, if you tap a land for mana, it produces one mana of a color of your choice instead of any other type and amount. 1/1
Troyan, Gutsy Explorer 1GULegendary Creature — Vedalken Scout {T}: Add {G}{U}. Spend this mana only to cast spells with mana value 5 or greater or spells with {X} in their mana costs. {U}, {T}: Draw a card, then discard a card. 1/3
Halo Forager 1UBCreature — Faerie Rogue Flying When Halo Forager enters the battlefield, you may pay {X}. When you do, you may cast target instant or sorcery card with mana value X from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead. 3/1
Grave Choice 2BInstant Target opponent sacrifices a nontoken creature. If that creature had mana value 2 or less, conjure a duplicate of it into your hand. That duplicate perpetually gains "You may spend mana as though it were mana of any color to cast this spell."
Mech Hangar Land {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a Pilot or Vehicle spell. {3}, {T}: Target Vehicle becomes an artifact creature until end of turn.
Enduring Angel 2WWWCreature — Angel Flying, double strike You have hexproof. If your life total would be reduced to 0 or less, instead transform Enduring Angel and your life total becomes 3. Then if Enduring Angel didn't transform this way, you lose the game. 3/3
Selesnya Loft Gardens Plane — Ravnica If an effect would create one or more tokens, it creates twice that many of those tokens instead. If an effect would put one or more counters on a permanent, it puts twice that many of those counters on that permanent instead. Whenever chaos ensues, until end of turn, whenever you tap a land for mana, add one mana of any type that land produced.
Reality Twist UUUEnchantment Cumulative upkeep {1}{U}{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.) If tapped for mana, Plains produce {R}, Swamps produce {G}, Mountains produce {W}, and Forests produce {B} instead of any other type.
Tainted Remedy 2BEnchantment If an opponent would gain life, that player loses that much life instead.
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