Immediate Action — ruling 1

Conspiracies are never put into your deck. Instead, you put any number of conspiracies from your card pool into the command zone as the game begins. These conspiracies are face up unless they have hidden agenda, in which case they begin the game face down.

Immediate Action — ruling 2

A conspiracy doesn't count as a card in your deck for purposes of meeting minimum deck size requirements. (In most drafts, the minimum deck size is 40 cards.)

Immediate Action — ruling 3

You don't have to play with any conspiracy you draft. However, you have only one opportunity to put conspiracies into the command zone, as the game begins. You can't put conspiracies into the command zone after this point.

Immediate Action — ruling 4

You can look at any player's face-up conspiracies at any time. You'll also know how many face-down conspiracies a player has in the command zone, although you won't know what they are.

Immediate Action — ruling 5

A conspiracy's static and triggered abilities function as long as that conspiracy is face-up in the command zone.

Immediate Action — ruling 6

Conspiracies are colorless, have no mana cost, and can't be cast as spells.

Immediate Action — ruling 7

Conspiracies aren't legal for any sanctioned Constructed format, but may be included in other Limited formats, such as Cube Draft.

Immediate Action — ruling 8

You name the card as the game begins, as you put the conspiracy into the command zone, not as you turn the face-down conspiracy face up.

Immediate Action : règles, fonctionnement et interactions (MTG)

Immediate Action 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

Hidden agenda (Start the game with this conspiracy face down in the command zone and secretly choose a card name. You may turn this conspiracy face up any time and reveal that name.) Creatures you control with the chosen name have haste.

How it works : Immediate Action

Original English text — Wizards of the Coast / Scryfall

#1August 23, 2016· Wizards of the Coast
Conspiracies are never put into your deck. Instead, you put any number of conspiracies from your card pool into the command zone as the game begins. These conspiracies are face up unless they have hidden agenda, in which case they begin the game face down.
No other card is named in this ruling.
#2August 23, 2016· Wizards of the Coast
A conspiracy doesn't count as a card in your deck for purposes of meeting minimum deck size requirements. (In most drafts, the minimum deck size is 40 cards.)
No other card is named in this ruling.
#3August 23, 2016· Wizards of the Coast
You don't have to play with any conspiracy you draft. However, you have only one opportunity to put conspiracies into the command zone, as the game begins. You can't put conspiracies into the command zone after this point.
No other card is named in this ruling.
#4August 23, 2016· Wizards of the Coast
You can look at any player's face-up conspiracies at any time. You'll also know how many face-down conspiracies a player has in the command zone, although you won't know what they are.
No other card is named in this ruling.
#5August 23, 2016· Wizards of the Coast
A conspiracy's static and triggered abilities function as long as that conspiracy is face-up in the command zone.
No other card is named in this ruling.
#6August 23, 2016· Wizards of the Coast
Conspiracies are colorless, have no mana cost, and can't be cast as spells.
No other card is named in this ruling.
#7August 23, 2016· Wizards of the Coast
Conspiracies aren't legal for any sanctioned Constructed format, but may be included in other Limited formats, such as Cube Draft.
No other card is named in this ruling.
#8August 23, 2016· Wizards of the Coast
You name the card as the game begins, as you put the conspiracy into the command zone, not as you turn the face-down conspiracy face up.
No other card is named in this ruling.
#9August 23, 2016· Wizards of the Coast
There are several ways to secretly name a card, including writing the name on a piece of paper that's kept with the face-down conspiracy. If you have multiple face-down conspiracies, you may name a different card for each one. It's important that each named card is clearly associated with only one of the conspiracies.
No other card is named in this ruling.
#10August 23, 2016· Wizards of the Coast
You must name a Magic card. Notably, you can't name a token.
No other card is named in this ruling.
#11August 23, 2016· Wizards of the Coast
If you play multiple games after the draft, you can name a different card in each new game.
No other card is named in this ruling.
#12August 23, 2016· Wizards of the Coast
As a special action, you may turn a face-down conspiracy face up. You may do so any time you have priority. This action doesn't use the stack and can't be responded to. Once face up, the named card is revealed and the conspiracy's abilities will affect the game.
No other card is named in this ruling.
#13August 23, 2016· Wizards of the Coast
At the end of the game, you must reveal any face-down conspiracies you own in the command zone to all players.
No other card is named in this ruling.
#14August 23, 2016· Wizards of the Coast
A conspiracy with hidden agenda that has a triggered ability must be face up before that ability's trigger condition is met in order for it to trigger. Turning it face up afterward won't have any effect.
No other card is named in this ruling.
#15August 23, 2016· Wizards of the Coast
At the end of the game, you must reveal any face-down conspiracies you own in the command zone to all players. Notably, you can't bluff conspiracies with hidden agenda by putting other cards into the command zone face down as the game starts.
No other card is named in this ruling.