Price$12.17 – $27.67
Buy on TCGplayerRuby Medallion
Artifact
LegalRank #316
Red spells you cast cost 
less to cast.
Why is this card good?
Ruby Medallion is a quietly excellent ramp piece for mono-red and red-heavy decks. Unlike a Sol Ring or mana rock, it doesn't add mana — it cheapens every red spell you cast, which compounds hard over a long game. Cast three red spells in a turn and you've effectively generated three mana.
The catch: it only discounts red spells, so its value scales directly with how mono-red your deck is. In dedicated mono-red builds (Krenko, Torbran, Zada, Birgi spellslinger) it's near-best-in-slot, and it's a key enabler for storm-style turns where you're chaining cheap red spells. Pair it with cost-reducers like Birgi or other Medallions and your spells start going off.
When to skip it: multicolor decks where a big chunk of your spells aren't red — a generic mana rock often serves you better there. It also does nothing the turn it lands (no immediate mana), so slower or low-spell-count decks won't feel it. Want raw spell density to make it pay off.
Related cards
Sapphire Medallion
Same cycle, reduces blue spell costs.
Emerald Medallion
Same cycle, reduces green spell costs.
Jet Medallion
Same cycle, reduces black spell costs.
Pearl Medallion
Same cycle, reduces white spell costs.
Helm of Awakening
Reduces all spells by {1}, broader cost reduction.
Cloud Key
Names a card type to reduce its casting costs.
Goblin Electromancer
Reduces instant/sorcery costs, great in red spellslinger.
Printings (8)
Played by these commanders
Daretti, Scrap Savant100% of 2
Combos (8)
- Reiterate + Seething Song + Ruby Medallion
→ Infinite magecraft triggers, Infinite storm count
- Reiterate + Seething Song + Runaway Steam-Kin + Ruby Medallion
→ Infinite magecraft triggers, Infinite red mana, Infinite storm count
- Birgi, God of Storytelling // Harnfel, Horn of Bounty + Grinning Ignus + Ruby Medallion
→ Infinite colorless mana, Infinite ETB, Infinite LTB
- Reiterate + Pyretic Ritual + Bonus Round + Ruby Medallion
→ Infinite magecraft triggers, Infinite red mana, Infinite storm count
- Reiterate + Desperate Ritual + Bonus Round + Ruby Medallion
→ Infinite magecraft triggers, Infinite red mana, Infinite storm count
- Birgi, God of Storytelling // Harnfel, Horn of Bounty + Squee, the Immortal + Skirk Prospector + Ruby Medallion
→ Infinite ETB, Infinite LTB, Infinite sacrifice triggers
Rulings (5)
- 2023-07-28
If a spell you cast has
in its mana cost, you choose the value of X before calculating the spell's total cost. - 2023-07-28
The ability doesn't change the mana cost or mana value of any spell. It changes only the total cost you pay.
- 2023-07-28
The ability can't reduce the amount of colored mana you pay for a spell. It reduces only the generic mana component of that cost.
- 2023-07-28
If there are additional costs to cast a spell, or if the cost to cast a spell is increased by an effect (such as the one created by Thalia, Guardian of Thraben's ability), apply those increases before applying cost reductions.
- 2023-07-28
The cost reduction can apply to alternative costs such as flashback costs.