The battalion thought they could escape the fog by marching in a straight line. Three days later, they began to suspect it was following them.

Fog Bank

Defender (This creature can't attack.)
Flying
Prevent all combat damage that would be dealt to and dealt by this creature.

Foundations

"The union of sea and sky makes a perfect cover."
—Talrand, sky summoner

Modern Horizons 3 Commander

Defender, flying
Prevent all combat damage that would be dealt to and dealt by Fog Bank.

Commander Masters

Game Night: Free-for-All

The List

Fog Bank's prevention effect isn't considered while assigning combat damage from a creature with trample. For example, if it blocks a 5/5 creature with trample, that creature's controller must assign 2 of that creature's combat damage to Fog Bank and the remainder can be assigned to the defending player, planeswalker, or battle.