"I barely escaped with my life. At that number, they could take on Emrakul herself!"
—Samila, Murasa Expeditionary House

Squirrel Mob

This creature gets +1/+1 for each other Squirrel on the battlefield.

Bloomburrow Commander

Squirrel Mob gets +1/+1 for each other Squirrel on the battlefield.

Jumpstart: Historic Horizons

Modern Horizons 2

Secret Lair Drop

The List

Because damage remains marked on a creature until the cleanup step or an effect removes that damage, nonlethal damage dealt to Squirrel Mob may become lethal if the number of other Squirrels on the battlefield decreases.