Squirrel Mob 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

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

Complete guide

Welcome to the forest, where numbers truly mean power for our fuzzy friends. Squirrel Mob is a classic tribal centerpiece that thrives when it is surrounded by its kin. As your Squirrel army grows, so does this creature's potential to dominate the battlefield.

Scaling Power

Squirrel Mob has a static ability that continuously checks the battlefield for other creatures with the Squirrel subtype. It does not count itself, but it counts every other Squirrel regardless of who controls them. This effect is a continuous layer 7c power and toughness modification, meaning it updates instantly as Squirrels enter or leave the battlefield.

State-Based Actions and Toughness

Because Squirrel Mob's toughness is tied to the presence of other Squirrels, you must be careful during combat or when spells are cast. If Squirrel Mob has taken damage and a different Squirrel is destroyed later in the turn, the Mob's toughness will immediately decrease. If its new toughness is less than or equal to the damage already marked on it, the Mob will be destroyed by state-based actions.

Common Mistakes

A frequent error is forgetting that Squirrel Mob only counts 'other' Squirrels; if it is the only Squirrel you control, it remains a base 2/2. Additionally, players sometimes forget that this ability works globally. If your opponent also controls Squirrels, those will contribute to your Squirrel Mob's power and toughness as well.

When to Play It

Squirrel Mob is most effective in the mid-game after you have established a board presence. Since it lacks natural evasion, it serves best as a massive blocker or a threat that forces your opponent to use their removal spells on a creature that isn't even your commander.

Interaction examples

Standalone Presence

If you cast Squirrel Mob while no other Squirrels are on the battlefield, it enters as a 2/2 creature. Its static ability is active, but since the count of 'other Squirrels' is zero, it receives no bonus.

Dynamic Growth

Solemn Simulacrum

If you control a Squirrel Mob and a Solemn Simulacrum, the Mob is a 2/2 because Solemn Simulacrum is a Golem, not a Squirrel. If you were to play a card like Acorn Harvest to create Squirrel tokens, the Mob would immediately grow by +1/+1 for each token created.

Non-Synergistic Blockers

Sakura-Tribe Elder

While Sakura-Tribe Elder provides excellent ramp, sacrificing it to find a land does not affect Squirrel Mob's stats. This illustrates that Squirrel Mob only cares about the Squirrel subtype; other utility creatures like Snake Shamans do not contribute to its strength.

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