Sphere of Reason
Enchantment
If a blue source would deal damage to you, prevent 2 of that damage.
- CMC
- 4
- Mana cost
- Color identity
- W
- Rarity
- uncommon
- Set
- Odyssey
- Price
- $0.21
- EDHREC rank
- #28705
Sphere of Reason taxes instant and sorcery spells by one mana, which punishes spell-heavy decks but costs you nothing to keep on board once it's down. It's a niche stax piece — strong in the right shell, dead weight outside of it.
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 |
In Commander, Sphere of Reason finds its best home in white stax builds looking to slow down storm, spellslinger, and combo decks that chain instants and sorceries — taxing even a single spell per turn at a table of four adds up fast. Outside dedicated hate-bear or taxation shells, it's too narrow to run, since creature-based strategies simply ignore it. In Legacy and Vintage, where fast spells are the entire game plan, Sphere of Reason is theoretically relevant but competes with more universal tax effects that don't give opponents an opt-out by paying one more. Oathbreaker mirrors the Commander case — useful against spell-heavy signature spells, irrelevant otherwise.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.21 bulk tier
At $0.21, Sphere of Reason is firmly bulk — a throw-in cost for a niche effect. Bulk stax pieces like this rarely climb in price unless a new commander or format shift suddenly makes instant-and-sorcery taxation mainstream, so don't expect it to appreciate.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.