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
Glimpse the Cosmos 1USorcery Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. As long as you control a Giant, you may cast Glimpse the Cosmos from your graveyard by paying {U} rather than paying its mana cost. If you cast Glimpse the Cosmos this way and it would be put into your graveyard, exile it instead.
Yawgmoth's Testament 2BSorcery Until end of turn, you may play face-up cards you own from exile. If a card would be put into your graveyard or exile from anywhere this turn, put it on the bottom of your library instead.
Arcum's Astrolabe SSnow Artifact ({S} can be paid with one mana from a snow source.) When Arcum's Astrolabe enters the battlefield, draw a card. {1}, {T}: Add one mana of any color.
Energy Refractor 2Artifact When Energy Refractor enters the battlefield, draw a card. {2}: Add one mana of any color.
Prophetic Prism 2Artifact When Prophetic Prism enters the battlefield, draw a card. {1}, {T}: Add one mana of any color.
Emrakul's Influence 2GGEnchantment Whenever you cast an Eldrazi creature spell with mana value 7 or greater, draw two cards.
Game of Chaos RRRSorcery Flip a coin. If you win the flip, you gain 1 life and target opponent loses 1 life, and you decide whether to flip again. If you lose the flip, you lose 1 life and that opponent gains 1 life, and that player decides whether to flip again. Double the life stakes with each flip.
Vesper Ghoul 2BCreature — Zombie Druid {T}, Pay 1 life: Add one mana of any color. 1/1
Zaxara, the Exemplary 1BGULegendary Creature — Nightmare Hydra Deathtouch {T}: Add two mana of any one color. Whenever you cast a spell with {X} in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it. 2/3
Nine Lives 1WWEnchantment Hexproof If a source would deal damage to you, prevent that damage and put an incarnation counter on Nine Lives. When there are nine or more incarnation counters on Nine Lives, exile it. When Nine Lives leaves the battlefield, you lose the game.
Page 80