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
Lavinia of the Tenth 3WULegendary Creature — Human Soldier Protection from red When Lavinia of the Tenth enters the battlefield, detain each nonland permanent your opponents control with mana value 4 or less. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.) 4/4
Contaminated Ground 1BEnchantment — Aura Enchant land Enchanted land is a Swamp. Whenever enchanted land becomes tapped, its controller loses 2 life.
Kyren Legate 1RCreature — Goblin If an opponent controls a Plains and you control a Mountain, you may cast this spell without paying its mana cost. Haste 1/1
Mystic Monstrosity Artifact Creature — Construct Lands you control have "{T}: Add one mana of any color." 5/6
Arvinox, the Mind Flail 4BBBLegendary Enchantment Creature — Horror Arvinox, the Mind Flail isn't a creature unless you control three or more permanents you don't own. At the beginning of your end step, exile the bottom card of each opponent's library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells. 9/9
Circle of Protection: White 1WEnchantment {1}: The next time a white source of your choice would deal damage to you this turn, prevent that damage.
Scythe Specter 4BBCreature — Specter Flying Whenever Scythe Specter deals combat damage to a player, each opponent discards a card. Each player who discarded a card with the highest mana value among cards discarded this way loses life equal to that mana value. 4/4
Fiery Gambit 2RSorcery Flip a coin until you lose a flip or choose to stop flipping. If you lose a flip, Fiery Gambit has no effect. If you win one or more flips, Fiery Gambit deals 3 damage to target creature. If you win two or more flips, Fiery Gambit deals 6 damage to each opponent. If you win three or more flips, draw nine cards and untap all lands you control.
Righteous Aura 1WEnchantment {W}, Pay 2 life: The next time a source of your choice would deal damage to you this turn, prevent that damage.
Unpredictable Cyclone 3RREnchantment If a cycling ability of another nonland card would cause you to draw a card, instead exile cards from the top of your library until you exile a card that shares a card type with the cycled card. You may cast that card without paying its mana cost. Then put the exiled cards that weren't cast this way on the bottom of your library in a random order. Cycling {2} ({2}, Discard this card: Draw a card.)
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