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
Once Upon a Time 1GInstant If this spell is the first spell you've cast this game, you may cast it without paying its mana cost. Look at the top five cards of your library. You may reveal a creature or land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
Ancient Greenwarden 4GGCreature — Elemental Reach You may play lands from your graveyard. If a land entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. 5/7
Amphibious Kavu 2GCreature — Kavu Whenever Amphibious Kavu blocks or becomes blocked by one or more blue and/or black creatures, Amphibious Kavu gets +3/+3 until end of turn. 2/2
Time and Tide UUInstant Simultaneously, all phased-out creatures phase in and all creatures with phasing phase out.
Anthousa, Setessan Hero 3GGLegendary Creature — Human Warrior Heroic — Whenever you cast a spell that targets Anthousa, Setessan Hero, up to three target lands you control each become 2/2 Warrior creatures until end of turn. They're still lands. 4/5
Energy Arc WUInstant Untap any number of target creatures. Prevent all combat damage that would be dealt to and dealt by those creatures this turn.
Ghirapur Plane — Kaladesh At the beginning of combat on your turn, until end of turn, each noncreature, non-Vehicle artifact you control becomes a 5/3 Vehicle in addition to its other types and gains trample, haste, and crew 2. Whenever chaos ensues, return target noncreature artifact card from your graveyard to your hand.
Blessed Sanctuary 3WWEnchantment Prevent all noncombat damage that would be dealt to you and creatures you control. Whenever a nontoken creature enters the battlefield under your control, create a 2/2 white Unicorn creature token.
Knight-Errant of Eos 4WCreature — Human Knight Convoke When Knight-Errant of Eos enters the battlefield, look at the top six cards of your library. You may reveal up to two creature cards with mana value X or less from among them, where X is the number of creatures that convoked Knight-Errant of Eos. Put the revealed cards into your hand, then shuffle. 4/4
Fylamarid 1UUCreature — Squid Beast Flying Fylamarid can't be blocked by blue creatures. {U}: Target creature becomes blue until end of turn. 1/3
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