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
Marut 8Artifact Creature — Construct Trample When Marut enters the battlefield, if mana from a Treasure was spent to cast it, create a Treasure token for each mana from a Treasure spent to cast it. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") 7/7
Bottle of Suleiman 4Artifact {1}, Sacrifice Bottle of Suleiman: Flip a coin. If you win the flip, create a 5/5 colorless Djinn artifact creature token with flying. If you lose the flip, Bottle of Suleiman deals 5 damage to you.
Tarnation Vista Land Tarnation Vista enters the battlefield tapped. As it enters, choose a color. {T}: Add one mana of the chosen color. {1}, {T}: For each color among monocolored permanents you control, add one mana of that color.
Amphibian Accident 1UInstant — Adventure Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.
Turn to Frog 1UInstant Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.
Serene Offering 1WInstant Destroy target enchantment. You gain life equal to its mana value.
Gruul War Plow 4Artifact Creatures you control have trample. {1}{R}{G}: Gruul War Plow becomes a 4/4 Juggernaut artifact creature until end of turn.
Treasure Keeper 4Artifact Creature — Construct When Treasure Keeper dies, reveal cards from the top of your library until you reveal a nonland card with mana value 3 or less. You may cast that card without paying its mana cost. Put all revealed cards not cast this way on the bottom of your library in a random order. 3/3
Opposition Agent 2BCreature — Human Rogue Flash You control your opponents while they're searching their libraries. While an opponent is searching their library, they exile each card they find. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them. 3/2
Underworld Fires 1RSorcery Underworld Fires deals 1 damage to each creature and each planeswalker. If a permanent dealt damage this way would die this turn, exile it instead.
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