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
Pandora's Box 5Artifact {3}, {T}: Choose a random summon card from all players' decks. For each player, flip a coin. If the flip ends up heads, put a token creature into play and treat it as though an exact copy of the chosen summon card were just played.
Celestial Colonnade Land Celestial Colonnade enters the battlefield tapped. {T}: Add {W} or {U}. {3}{W}{U}: Until end of turn, Celestial Colonnade becomes a 4/4 white and blue Elemental creature with flying and vigilance. It's still a land.
Profane Command XBBSorcery Choose two — • Target player loses X life. • Return target creature card with mana value X or less from your graveyard to the battlefield. • Target creature gets -X/-X until end of turn. • Up to X target creatures gain fear until end of turn. (They can't be blocked except by artifact creatures and/or black creatures.)
Runesword 6Artifact {3}, {T}: Target attacking creature gets +2/+0 until end of turn. When that creature leaves the battlefield this turn, sacrifice Runesword. If the creature deals damage to a creature this turn, the creature dealt damage can't be regenerated this turn. If a creature dealt damage by the targeted creature would die this turn, exile that creature instead.
Relic's Roar UInstant Until end of turn, target artifact or creature becomes a Dinosaur artifact creature with base power and toughness 4/3 in addition to its other types.
Mirrodin's Core Land {T}: Add {C}. {T}: Put a charge counter on Mirrodin's Core. {T}, Remove a charge counter from Mirrodin's Core: Add one mana of any color.
Sanctuary Blade 2Artifact — Equipment As Sanctuary Blade becomes attached to a creature, choose a color. Equipped creature gets +2/+0 and has protection from the last chosen color. Equip {3}
Restless Vents Land Restless Vents enters the battlefield tapped. {T}: Add {B} or {R}. {1}{B}{R}: Until end of turn, Restless Vents becomes a 2/3 black and red Insect creature with menace. It's still a land. Whenever Restless Vents attacks, you may discard a card. If you do, draw a card.
Torment of Hailfire XBBSorcery Repeat the following process X times. Each opponent loses 3 life unless that player sacrifices a nonland permanent or discards a card.
Cryptoplasm 1UUCreature — Shapeshifter At the beginning of your upkeep, you may have Cryptoplasm become a copy of another target creature, except it has this ability. 2/2
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