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
Share the Spoils 1REnchantment When Share the Spoils enters the battlefield or an opponent loses the game, exile the top card of each player's library. During each player's turn, that player may play a land or cast a spell from among cards exiled with Share the Spoils, and they may spend mana as though it were mana of any color to cast that spell. When they do, exile the top card of their library.
Knowledge Exploitation 5UUTribal Sorcery — Rogue Prowl {3}{U} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.) Search target opponent's library for an instant or sorcery card. You may cast that card without paying its mana cost. Then that player shuffles.
Goldhound RArtifact Creature — Treasure Dog First strike Menace (This creature can't be blocked except by two or more creatures.) {T}, Sacrifice Goldhound: Add one mana of any color. 1/1
Prismatic Circle 2WEnchantment Cumulative upkeep {1} (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.) As Prismatic Circle enters the battlefield, choose a color. {1}: The next time a source of your choice of the chosen color would deal damage to you this turn, prevent that damage.
Valkmira, Protector's Shield 3WLegendary Artifact If a source an opponent controls would deal damage to you or a permanent you control, prevent 1 of that damage. Whenever you or another permanent you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {1}.
Painful Truths 2BSorcery Converge — You draw X cards and you lose X life, where X is the number of colors of mana spent to cast this spell.
Lurking Skirge 1BEnchantment When a creature is put into an opponent's graveyard from the battlefield, if Lurking Skirge is an enchantment, Lurking Skirge becomes a 3/2 Phyrexian Imp creature with flying.
Divine Purge 1WWSorcery Exile all artifacts and creatures with mana value 3 or less. They perpetually gain "This spell costs {2} more to cast" and "This permanent enters the battlefield tapped." For as long as each of them remain exiled, its owner may play it.
Emergency Powers 5WUInstant Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Emergency Powers. Addendum — If you cast this spell during your main phase, you may put a permanent card with mana value 7 or less from your hand onto the battlefield.
Radiant Kavu RGWCreature — Kavu {R}{G}{W}: Prevent all combat damage blue creatures and black creatures would deal this turn. 3/3
Page 140