The Eon Fog — ruling 1

A plane card is treated as if its text box included "When you roll {PW}, put this card on the bottom of its owner's planar deck face down, then move the top card of your planar deck off that planar deck and turn it face up." This is called the "planeswalking ability."

The Eon Fog — ruling 2

A face-up plane card that's turned face down becomes a new object with no relation to its previous existence. In particular, it loses all counters it may have had.

The Eon Fog — ruling 3

The controller of a face-up plane card is the player designated as the "planar controller." Normally, the planar controller is whoever the active player is. However, if the current planar controller would leave the game, instead the next player in turn order that wouldn't leave the game becomes the planar controller, then the old planar controller leaves the game. The new planar controller retains that designation until they leave the game or a different player becomes the active player, whichever comes first.

The Eon Fog — ruling 4

If an ability of a plane refers to "you," it's referring to whoever the plane's controller is at the time, not to the player that started the game with that plane card in their deck. Many abilities of plane cards affect all players, while many others affect only the planar controller, so read each ability carefully.

The Eon Fog : règles, fonctionnement et interactions (MTG)

The Eon Fog 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

Players skip their untap steps. Whenever chaos ensues, untap all permanents you control.

Complete guide

Welcome to Equilor, a realm where time itself has ground to a halt. The Eon Fog is a Plane card that significantly alters the pace of the game by freezing your resources in place. Navigating this dense mist requires careful planning and a bit of luck with the planar die.

Stalling the Clock

While The Eon Fog is the face-up plane, the most fundamental part of the Magic turn—the untap step—is skipped entirely for every player. This means that any lands, creatures, or artifacts tapped for mana or abilities will remain tapped indefinitely unless an outside effect intervenes. The game becomes a battle of attrition where every spent resource must be weighed carefully against the silence of the fog.

Resolution and Chaos

The second ability is a triggered ability that occurs whenever chaos ensues (typically when a player rolls the chaos symbol on the planar die). When this trigger resolves, the current planar controller—usually the active player—untaps all permanents they control. Because the 'you' in the text refers to the current planar controller, only the player whose turn it is will benefit from this refresh when they roll the chaos symbol.

Strategic Considerations

A common mistake is forgetting that 'Players skip their untap steps' applies to everyone, including the planar controller. You do not get a free pass just because you are the active player. To get your mana back, you must either roll chaos or planeswalk away to a different plane where the untap step functions normally. If you are stuck here, cards that provide mana without tapping or those that untap themselves become incredibly valuable.

Interaction examples

The Resource Crunch

Sol Ring

Command Tower

If you tap Command Tower and Sol Ring to cast a spell while The Eon Fog is active, those two permanents will not untap at the start of your next turn. Without the chaos trigger, you will have three fewer mana available for the rest of the time you spend on Equilor.

Breaking the Fog

Sol Ring

Suppose your Sol Ring is tapped. During your main phase, you roll the planar die and it lands on the chaos symbol. The Eon Fog's second ability triggers and goes on the stack. Upon resolution, you untap all permanents you control, including your Sol Ring, effectively bypassing the skipped untap step for that turn.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : The Eon Fog

Original English text — Wizards of the Coast / Scryfall

#1October 1, 2009· Wizards of the Coast
A plane card is treated as if its text box included "When you roll , put this card on the bottom of its owner's planar deck face down, then move the top card of your planar deck off that planar deck and turn it face up." This is called the "planeswalking ability."
No other card is named in this ruling.
#2October 1, 2009· Wizards of the Coast
A face-up plane card that's turned face down becomes a new object with no relation to its previous existence. In particular, it loses all counters it may have had.
No other card is named in this ruling.
#3October 1, 2009· Wizards of the Coast
The controller of a face-up plane card is the player designated as the "planar controller." Normally, the planar controller is whoever the active player is. However, if the current planar controller would leave the game, instead the next player in turn order that wouldn't leave the game becomes the planar controller, then the old planar controller leaves the game. The new planar controller retains that designation until they leave the game or a different player becomes the active player, whichever comes first.
No other card is named in this ruling.
#4October 1, 2009· Wizards of the Coast
If an ability of a plane refers to "you," it's referring to whoever the plane's controller is at the time, not to the player that started the game with that plane card in their deck. Many abilities of plane cards affect all players, while many others affect only the planar controller, so read each ability carefully.
No other card is named in this ruling.