Fomori Vault
Land
: Add 
.
, , Discard a card: Look at the top X cards of your library, where X is the number of artifacts you control. Put one of those cards into your hand and the rest on the bottom of your library in a random order.
- CMC
- 0
- Mana cost
- Color identity
- C
- Rarity
- mythic
- Set
- The Big Score Promos
- Price
- $7.86
- EDHREC rank
- #1627
Fomori Vault turns any activated ability into a mana-positive engine — tap it for colorless, spend that colorless inside the ability, and you've effectively reduced the cost by one each time. With Zirda, the Dawnwaker already cutting activated ability costs by two, the Vault's output becomes nearly free fuel for whatever engine you're running.
Best Commanders
Commanders with the highest synergy
Zirda, the Dawnwaker
Zirda, the Dawnwaker's static cost reduction stacks directly with Fomori Vault's mana generation, often making repeated activations net zero or better — it's the single tightest pairing the Vault has.
The Cabbage Merchant
The Cabbage Merchant's token-generating activated abilities eat mana quickly, and Fomori Vault offsets that cost every turn it stays on board.
Tameshi, Reality Architect
Tameshi, Reality Architect bounces and replays permanents repeatedly, and Fomori Vault's colorless shaves off the activation tax on each loop.
Imskir Iron-Eater
Imskir Iron-Eater sacrifices artifacts for value, and Fomori Vault feeds that loop with colorless while also being a sacrifice target itself if needed.
Iron Man, Titan of Innovation
Iron Man, Titan of Innovation runs a dense suite of Equipment and activated abilities, and Fomori Vault slots in as a passive cost-reducer that pays for itself over a long game.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
In Commander, Fomori Vault earns its slot in any deck built around repeated activated abilities — the colorless it generates is effectively a discount that compounds across a full game. Outside Commander, the Vault is legal in Standard, Pioneer, Modern, Legacy, and Vintage, but activated-ability-matters shells are niche in those formats and rarely want a land that enters tapped with a conditional payoff. Pauper is the only format where it's off the table entirely. The honest answer is that this is a Commander card that happens to have broad legality.
Key Combos
Combo lines featuring this card
Budget Alternatives
Cheaper options that do most of the same work
Survivors' Encampment and Holdout Settlement both tap creatures to produce colorless mana and cost nothing, trading Fomori Vault's activated-ability synergy for raw accessibility — fine if you just need colorless fixing, wrong swap if the cost-reduction angle is the reason you're running the Vault. Mobile Garrison and similar untap-on-attack effects can mimic part of the engine in creature-heavy builds, but nothing replicates the Vault's exact function at a lower price point; the better question is whether your deck needs the effect at all.
Price Context
Current price
$7.86 mid tier
At $7.86, Fomori Vault sits in the mid tier — noticeable but not a barrier for most Commander budgets. It's a niche card with a specific home, so price stability depends entirely on whether activated-ability commanders stay popular rather than any broad demand.
Explore
Sources
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.