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
Sign in Blood BBSorcery Target player draws two cards and loses 2 life.
Rally the Ancestors XWWInstant Return each creature card with mana value X or less from your graveyard to the battlefield. Exile those creatures at the beginning of your next upkeep. Exile Rally the Ancestors.
Bonecrusher Giant 2RCreature — Giant Whenever Bonecrusher Giant becomes the target of a spell, Bonecrusher Giant deals 2 damage to that spell's controller. 4/3
Ore-Rich Stalactite 1RArtifact {T}: Add {R}. Spend this mana only to cast an instant or sorcery spell. Craft with four or more red instant and/or sorcery cards {3}{R}{R} ({3}{R}{R}, Exile this artifact, Exile the four or more from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)
High Tide UInstant Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.
A-Sewer Crocodile 5UCreature — Crocodile {3}{U}: Sewer Crocodile can't be blocked this turn. This ability costs {3} less to activate if there are five or more mana values among cards in your graveyard. 4/7
Progenitor's Icon 3Artifact As Progenitor's Icon enters the battlefield, choose a creature type. {T}: Add one mana of any color. {T}: The next spell of the chosen type you cast this turn can be cast as though it had flash.
Vivify 2GInstant Target land becomes a 3/3 creature until end of turn. It's still a land. Draw a card.
The Core Legendary Land (Transforms from Matzalantli.) Fathomless descent — {T}: Add X mana of any one color, where X is the number of permanent cards in your graveyard.
Undercity Plague 4BBSorcery Target player loses 1 life, discards a card, then sacrifices a permanent. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)
Page 237