Squirrel Mob

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

Acorn Harvest

Create two 1/1 green Squirrel creature tokens.
Flashback—{1}{G}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Squirrel Wrangler

{1}{G}, Sacrifice a land: Create two 1/1 green Squirrel creature tokens.
{1}{G}, Sacrifice a land: Squirrel creatures get +1/+1 until end of turn.

Kamahl, Fist of Krosa

{G}: Target land becomes a 1/1 creature until end of turn. It's still a land.
{2}{G}{G}{G}: Creatures you control get +3/+3 and gain trample until end of turn.

Naturalize

Might of Oaks

Target creature gets +7/+7 until end of turn.

Liege of the Hollows

When this creature dies, each player may pay any amount of mana. Then each player creates a number of 1/1 green Squirrel creature tokens equal to the amount of mana they paid this way.

Whirling Dervish

Protection from black
At the beginning of each end step, if this creature dealt damage to an opponent this turn, put a +1/+1 counter on it.

Heart Warden

{T}: Add {G}.
{2}, Sacrifice this creature: Draw a card.

Nut Collector

At the beginning of your upkeep, you may create a 1/1 green Squirrel creature token.
Threshold — All Squirrels get +2/+2 as long as there are seven or more cards in your graveyard.

Forest

Squirrel Nest

Enchant land
Enchanted land has "{T}: Create a 1/1 green Squirrel creature token."

Wall of Blossoms

Defender
When this creature enters, draw a card.

Folk Medicine

You gain 1 life for each creature you control.
Flashback {1}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Biorhythm

Each player's life total becomes the number of creatures they control.

Gaea's Cradle

{T}: Add {G} for each creature you control.

Chatter of the Squirrel

Create a 1/1 green Squirrel creature token.
Flashback {1}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Werebear

{T}: Add {G}.
Threshold — This creature gets +3/+3 as long as there are seven or more cards in your graveyard.

Crop Rotation

As an additional cost to cast this spell, sacrifice a land.
Search your library for a land card, put that card onto the battlefield, then shuffle.