Mass Hysteria is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
All creatures have haste.
Complete guide
Mass Hysteria is a powerful one-mana enchantment that changes the tempo of the entire game by granting immediate speed to all creatures. Because it affects every creature on the battlefield regardless of who controls it, both players must be prepared for an aggressive shift in strategy.
What It Does
Mass Hysteria provides a static ability that gives haste to all creatures. This means creatures do not need to have been under their controller's control since the beginning of their most recent turn to attack or use abilities with the tap or untap symbol. This effect is symmetrical, applying to your creatures and your opponents' creatures alike.
How It Resolves Step by Step
When Mass Hysteria is cast and enters the battlefield, its static effect begins immediately. First, the enchantment checks the battlefield for all permanents with the 'creature' type. Second, it applies the haste keyword to those permanents. This effect does not use the stack once the enchantment is in play, so as soon as a new creature enters the battlefield, it already has haste.
Common Mistakes
The most frequent error is forgetting that Mass Hysteria is symmetrical. If you play this to attack immediately, you must remember that your opponent's creatures will also be able to attack or use tap abilities the moment they are played on their following turn. Additionally, if Mass Hysteria is destroyed, creatures that entered that turn will immediately lose haste and will no longer be able to attack unless they have haste from another source.
When to Play It
This card is best utilized in aggressive decks that aim to end the game before an opponent can take advantage of the shared haste. It is also highly effective in combo decks where creatures need to tap for abilities the same turn they are played to secure a win.
Interaction examples
Urza's SagaWith Mass Hysteria on the battlefield, you can use the second lore counter ability of Urza's Saga to create a Construct artifact creature token. Normally, the token would have to wait a turn to attack, but thanks to the enchantment, the 0/0 Construct (buffed by your artifacts) can attack immediately the turn it is created.
Impact TremorsWhen you play a creature while both enchantments are out, Impact Tremors triggers to deal 1 damage to each opponent. Simultaneously, Mass Hysteria ensures that creature can also attack immediately. This combination applies pressure both through direct damage and combat damage in the same turn.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Mass Hysteria
Original English text — Wizards of the Coast / Scryfall
No additional ruling has been published for this card.
Popular combos
Real combos played by the community, sorted by popularity.
Krenko, Mob Boss + Skirk Prospector + Mass Hysteria
- 1Activate Krenko by tapping it, creating a number of 1/1 Goblin creature tokens equal to the number of Goblins you control.
- 2Activate Skirk Prospector by sacrificing Krenko, adding
. - 3Choose to return Krenko to the command zone from your graveyard.
- 4Activate Skirk Prospector by sacrificing a Goblin, adding .
- 5Repeat step 4 until you have enough mana to cast Krenko.
- 6Cast Krenko from the command zone by paying
plus commander tax. - 7Repeat.
Krenko, Mob Boss + Phyrexian Altar + Mass Hysteria
- 1Activate Krenko by tapping it, creating a number of 1/1 Goblin creature tokens equal to the number of Goblins you control.
- 2Activate Phyrexian Altar by sacrificing Krenko, adding .
- 3Choose to return Krenko to the command zone from your graveyard.
- 4Activate Phyrexian Altar by sacrificing a Goblin, adding .
- 5Repeat step 4 until you have enough mana to cast Krenko.
- 6Cast Krenko from the command zone by paying plus commander tax.
- 7Repeat.
Breath of Fury + Mass Hysteria
- 1Declare the creature with Breath of Fury attached and the creature with mobilize as attackers, triggering the creature with mobilize, creating at least one 1/1 Warrior creature token that is tapped and attacking.
- 2Deal combat damage using the creature that has Breath of Fury attached.
- 3Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the Warrior token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
- 4Repeat each combat phase.
Garth One-Eye + Displacer Kitten + Mass Hysteria
- 1Activate Garth One-Eye by tapping it, causing you to pay
to cast a copy of Black Lotus without paying its mana cost. - 2Displacer Kitten triggers, blinking Garth One-Eye.
- 3Repeat.
Garth One-Eye + Deadeye Navigator + Mass Hysteria
- 1Activate Garth One-Eye by tapping it, casting a copy of Black Lotus by paying .
- 2Activate the Black Lotus token by tapping and sacrificing it, adding
. - 3Activate Garth One-Eye by paying
, blinking it. - 4When Garth One-Eye enters, Deadeye Navigator's soulbond ability triggers, repairing it and Garth One-Eye.
- 5Repeat.
Krenko, Mob Boss + Thermopod + Mass Hysteria
- 1Activate Krenko by tapping it, creating a number of 1/1 Goblin creature tokens equal to the number of Goblins you control.
- 2Activate Thermopod's second ability by sacrificing Krenko, adding .
- 3Choose to return Krenko to the command zone from your graveyard.
- 4Activate Thermopod's second ability by sacrificing a Goblin, adding .
- 5Repeat step 4 until you have enough mana to cast Krenko.
- 6Cast Krenko from the command zone by paying plus commander tax.
- 7Repeat.
Temur Sabertooth + Selvala, Heart of the Wilds + Mass Hysteria
- 1Activate Selvala by paying
and tapping it, adding at least - 2Activate Temur Sabertooth by paying , returning Selvala from the battlefield to your hand.
- 3Cast Selvala by paying its mana cost.
- 4Repeat.
Breath of Fury + Mass Hysteria + General Kreat, the Boltbringer
- 1Declare the creature with Breath of Fury attached and General Kreat as attackers.
- 2General Kreat triggers, creating a creature token.
- 3When the creature token enters, General Kreat triggers, dealing 1 damage to each opponent.
- 4Deal combat damage using the creature that has Breath of Fury attached.
- 5Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the creature token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
- 6Repeat each combat phase.
Legal formats
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Meta decks with Mass Hysteria
No archived Top 8 deck with this card yet.