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Mass Hysteria

Enchantment

All creatures have haste.

CMC
1
Mana cost
{R}
Color identity
R
Rarity
rare
Set
Mirrodin
Price
$2.95
EDHREC rank
#3269
Buy on TCGplayer
Mass Hysteria card art
Mass Hysteria gives every creature on the battlefield haste for one red mana — a global effect at an absurd rate that aggressive and token strategies snap up immediately. Commanders like Krenko, Mob Boss and Thantis, the Warweaver are the target audience, but the symmetry is real and opponents will use it too, so run it when your board benefits more than theirs.

Best Commanders

Commanders with the highest synergy

01
Thantis, the Warweaver

Thantis, the Warweaver

17.6% of decks · synergy 0.16

Thantis, the Warweaver forces all creatures to attack each turn, and Mass Hysteria ensures that summoning-sick blockers your opponents just played can't sit back — they attack into Thantis and feed its counters immediately.

02
Krenko, Mob Boss

Krenko, Mob Boss

17.6% of decks · synergy 0.14

Krenko, Mob Boss needs haste to activate the same turn it lands, and Mass Hysteria delivers that for a single mana without consuming a creature slot — it's the most efficient enabler the deck has access to.

Format Analysis

Where it lives, where it can’t

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

Commander is where Mass Hysteria does the most work — one mana to accelerate an entire board is disproportionate in a format built around high-impact creatures that want to attack the turn they arrive. In Legacy and Vintage it's legal but rarely seen, since those formats have faster, more focused ways to close games and a one-mana enchantment that helps opponents isn't worth the slot. Modern could theoretically support it in aggressive creature builds, but the symmetry problem is worse in one-on-one and dedicated haste pieces on the creatures themselves are usually cleaner. Oathbreaker mirrors the Commander logic — if your planeswalker strategy leans on creatures, Mass Hysteria earns its spot.

Key Combos

Combo lines featuring this card

1,118 decks
Breath of FuryMass Hysteria

Breath of FuryMass Hysteria

Infinite LTB; Infinite ETB; Infinite sacrifice triggers; Infinite death triggers; Infinite combat phases; Infinite creature tokens with haste; Infinite untap of creatures you control; Infinite mana creatures you control can produce; Infinite combat damage

View on Commander Spellbook ↗
364 decks
Garth One-EyeDisplacer KittenMass Hysteria

Garth One-EyeDisplacer KittenMass Hysteria

Infinite copies of a specific artifact; Infinite card draw for any number of players; Infinite casts of all spells created by Garth One-Eye except Shivan Dragon; Infinite colored mana; Infinite draw triggers for any number of players; Infinite magecraft triggers; Infinite storm count

View on Commander Spellbook ↗
316 decks
Garth One-EyeDeadeye NavigatorMass Hysteria

Garth One-EyeDeadeye NavigatorMass Hysteria

Infinite ETB; Infinite LTB; Infinite blinking; Infinite card draw for any number of players; Infinite casts of all spells permitted by Garth One-Eye; Infinite colored mana; Infinite copies of a specific artifact; Infinite creature tokens with haste; Infinite draw triggers for any number of players; Infinite magecraft triggers; Infinite storm count; Infinitely powerful creature until end of turn; Return all cards from your graveyard to your hand

View on Commander Spellbook ↗

Price Context

Current price

$2.95 cheap tier

At $2.95, Mass Hysteria sits at the low end of functional Commander staples — cheap enough that the symmetry risk is the only real argument against running it, not the price. For a one-mana enchantment with this much throughput in haste-dependent decks, that's fair value and the card is unlikely to get meaningfully cheaper.

Explore

Sources

Mentioned

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