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Possibility Storm

Enchantment

Whenever a player casts a spell from their hand, that player exiles it, then exiles cards from the top of their library until they exile a card that shares a card type with it. That player may cast that card without paying its mana cost. Then they put all cards exiled with this enchantment on the bottom of their library in a random order.

CMC
5
Mana cost
{3}{R}{R}
Color identity
R
Rarity
rare
Set
Secret Lair Drop
Price
—
EDHREC rank
#4767
Buy on TCGplayer
Possibility Storm card art
Possibility Storm locks opponents out of casting spells predictably — pair it with Drannith Magistrate and nobody casts anything at all, since the Storm exiles the spell and the Magistrate bars casting from exile. The cost is that you need either a way to blank the chaos for yourself or a commander like Ian Malcolm, Chaotician who turns every trigger into a resource rather than a liability.

Best Commanders

Commanders with the highest synergy

01
Ian Malcolm, Chaotician

Ian Malcolm, Chaotician

41.7% of decks · synergy 0.40

Ian Malcolm, Chaotician is the natural home — every spell any player casts under Possibility Storm fires Malcolm's trigger, generating a cascade of Chaos tokens that bury opponents in card advantage while the Storm keeps their game plan spinning wildly off course.

02
Norin the Wary

Norin the Wary

28.2% of decks · synergy 0.27

Norin the Wary flickers himself whenever any spell is cast or creature attacks, so Possibility Storm effectively doubles the number of cast triggers firing each turn without ever putting Norin at risk of hitting something unintended off the Storm.

03
Neera, Wild Mage

Neera, Wild Mage

17.9% of decks · synergy 0.16

Neera, Wild Mage already replaces spells with random cards from the library, so Possibility Storm adds a second layer of chaotic replacement that Neera players are explicitly built to exploit rather than suffer through.

04
Ruric Thar, the Unbowed

Ruric Thar, the Unbowed

13.4% of decks · synergy 0.13

Ruric Thar, the Unbowed punishes noncreature spells with 6 damage, and Possibility Storm turns every noncreature spell into at least one more noncreature spell — meaning each attempt to cast an instant or sorcery deals a minimum of 12 damage to its caster.

05
Vaevictis Asmadi, the Dire

Vaevictis Asmadi, the Dire

9.1% of decks · synergy 0.09

Vaevictis Asmadi, the Dire already operates in a high-chaos permanents-matter space, and Possibility Storm warps opponents' spell-based interaction so thoroughly that Vaevictis can attack through a nearly neutered response suite.

Format Analysis

Where it lives, where it can’t

FormatVerdict
commander legal
legacy legal
modern legal
pioneer legal
standard not legal
vintage legal
pauper not legal
oathbreaker legal

Possibility Storm is legal across Commander, Legacy, Modern, Pioneer, Vintage, and Oathbreaker, but it sees virtually no competitive play outside Commander — five mana for a symmetrical enchantment is far too slow and too unreliable in formats where games end on turn three or four. In Commander it's a different story: the singleton rule means opponents can't reliably predict what they'll hit off the Storm, while you build your deck to minimize or exploit the chaos. The Drannith Magistrate lock is the most oppressive application, effectively shutting down all spell casting at instant and sorcery speed for opponents. In Oathbreaker it functions similarly to Commander but with a lower average game speed, so the five-mana investment is slightly more punishing to reach.

Key Combos

Combo lines featuring this card

Price Context

Current price

unknown tier

Pricing data for Possibility Storm isn't available in the current feed, so check Scryfall or TCGPlayer for the live number. It has seen multiple printings and tends to sit in the $3–8 range historically, making it an accessible pickup for most Commander budgets — but verify before buying.

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Sources

Mentioned

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Updated . Data from Scryfall, EDHREC, and Commander Spellbook.