Blinding Fog — ruling 1

Blinding Fog prevents all damage that would be dealt to creatures, not just combat damage.

Blinding Fog — ruling 2

Damage that would be dealt to creatures that enter the battlefield later in the turn will also be prevented. However, creatures that come under your control later in the turn won’t gain hexproof.

Blinding Fog : règles, fonctionnement et interactions (MTG)

Blinding 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

Prevent all damage that would be dealt to creatures this turn. Creatures you control gain hexproof until end of turn. (They can't be the targets of spells or abilities your opponents control.)

How it works : Blinding Fog

Original English text — Wizards of the Coast / Scryfall

#1September 29, 2017· Wizards of the Coast
Blinding Fog prevents all damage that would be dealt to creatures, not just combat damage.
No other card is named in this ruling.
#2September 29, 2017· Wizards of the Coast
Damage that would be dealt to creatures that enter the battlefield later in the turn will also be prevented. However, creatures that come under your control later in the turn won’t gain hexproof.
No other card is named in this ruling.