Weakstone
Artifact
Attacking creatures get -1/-0.
- CMC
- 4
- Mana cost
- Color identity
- C
- Rarity
- uncommon
- Set
- Antiquities
- Price
- $6.10
- EDHREC rank
- #27941
Weakstone taxes every creature an opponent controls by making each one cost an extra colorless mana to activate its abilities — a persistent, symmetric-looking effect that punishes tap-heavy strategies and ability-dense creature decks every turn it sits on the board. At three mana for a colorless artifact, it slots into any deck that wants to slow down mana dorks, Birthing Pod chains, or commanders that rely on activated abilities.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | not legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Weakstone is legal in Commander, Legacy, Vintage, and Oathbreaker, and that's where its entire competitive life lives — it's not Modern- or Pioneer-legal. In Commander, it's most disruptive against decks built around activated abilities on creatures: Krenko, Mob Boss; Selvala, Heart of the Wilds; Godo, Bandit Warlord — any commander that taps for value gets meaningfully slowed. Legacy and Vintage have so much fast mana that Weakstone rarely generates enough tempo to matter in those formats. Oathbreaker is the sweet spot after Commander: the smaller life totals and tighter resource curves mean even a single activation tax can swing a game.
Key Combos
Combo lines featuring this card
Budget Alternatives
Cheaper options that do most of the same work
Glaring Spotlight and Loxodon Warhammer don't replicate the activation tax, but if the goal is slowing down creature-based engines, Meekstone ($2–3) hits a similar axis by keeping high-power creatures tapped — it costs less and affects more boards. Weakstone is the better choice specifically when the opposing threat is an activated ability rather than an attack, so the two cards aren't direct substitutes: pick based on what your meta actually punishes.
Price Context
Current price
$6.10 mid tier
At $6.10, Weakstone sits in the mid-tier range for a utility artifact with a narrow but real application in Commander. It's a Reserved List card, so the price is stable in the sense that supply won't increase — but it's also a fringe inclusion, which keeps demand from pushing it much higher.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.